{"title":"Suspension Fluid","description":"\u003cp\u003eThe right suspension fluid is a foundational element of chassis performance, not an afterthought. Putoline GPR6 and Motul Factory Line shock oils give you the viscosity control needed to match your suspension setup to your riding conditions and rider weight.\u003c\/p\u003e\n\u003ch2\u003eHow to Choose Motorcycle Suspension Fluid\u003c\/h2\u003e\n\u003cp\u003eSuspension fluid viscosity directly determines damping response. A fluid that is too thick slows damping speed; too thin and your fork or shock cycles without control. The SAE viscosity grade printed on every bottle is your starting point, and matching it to your OEM specification or tuner's recommendation is the single most important step you can take.\u003c\/p\u003e\n\n\u003ch2\u003ePutoline GPR6 vs Motul Factory Line: Key Differences\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eProperty\u003c\/th\u003e\n      \u003cth\u003ePutoline GPR6\u003c\/th\u003e\n      \u003cth\u003eMotul Factory Line VI400\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eAvailable weights\u003c\/td\u003e\n      \u003ctd\u003e2.5W, 3.5W\u003c\/td\u003e\n      \u003ctd\u003eSingle SAE grade\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eViscosity Index\u003c\/td\u003e\n      \u003ctd\u003eStandard mineral base\u003c\/td\u003e\n      \u003ctd\u003eVI 400 (very high VI)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003ePrimary application\u003c\/td\u003e\n      \u003ctd\u003eShock absorbers\u003c\/td\u003e\n      \u003ctd\u003eShock absorbers\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eBulk option\u003c\/td\u003e\n      \u003ctd\u003eAvailable in 20 L\u003c\/td\u003e\n      \u003ctd\u003e1 L only\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eBrand origin\u003c\/td\u003e\n      \u003ctd\u003eNetherlands\u003c\/td\u003e\n      \u003ctd\u003eFrance\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eViscosity Grade Explained\u003c\/h2\u003e\n\u003cp\u003eThe \"W\" in 2.5W and 3.5W indicates a winter-grade viscosity measured at low temperature. Lower numbers mean thinner fluid and faster damping response at cold temperatures, which suits lighter riders or cooler climates. A 3.5W fluid provides more resistance per stroke, suiting heavier riders or riders who prefer a firmer mid-stroke feel. Most OEM rear shock specifications fall between 2.5W and 5W, so both GPR6 grades cover the majority of road and off-road applications.\u003c\/p\u003e\n\n\u003ch2\u003eMotul VI400 Technology\u003c\/h2\u003e\n\u003cp\u003eA Viscosity Index of 400 means the fluid resists thinning as it heats up across a service cycle. Standard mineral shock oils typically carry a VI of 90 to 120. At VI 400, the Motul Factory Line fluid maintains consistent damping force from a cold start through a full track or enduro session, reducing the fade that can occur when standard fluid thins under heat.\u003c\/p\u003e\n\n\u003ch2\u003eWhen to Change Suspension Fluid\u003c\/h2\u003e\n\u003cp\u003eMost manufacturers recommend a shock oil service every 2 years or 20,000 km, whichever comes first. Degraded fluid loses shear stability, which causes inconsistent damping and accelerated seal wear. Bulk 20 L options make periodic full-fleet servicing practical for workshops and race teams.\u003c\/p\u003e\u003cp class=\"related-collections\"\u003eRelated: \u003ca href=\"\/collections\/putoline-aftercare\"\u003ePutoline Aftercare\u003c\/a\u003e · \u003ca href=\"\/collections\/motul-aftercare\"\u003eMotul Aftercare\u003c\/a\u003e · \u003ca href=\"\/collections\/workshop-tools\"\u003eAll Workshop Tools \u0026amp; Stands\u003c\/a\u003e · \u003ca href=\"\/collections\/stands\"\u003eStands \u0026amp; Bobbins\u003c\/a\u003e · \u003ca href=\"\/collections\/engine-oil\"\u003eEngine Oil\u003c\/a\u003e\u003c\/p\u003e\u003cdiv class=\"collection-faq\"\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is the difference between 2.5W and 3.5W shock oil?\u003c\/h3\u003e\n\u003cp\u003eThe number refers to viscosity grade. 2.5W is thinner, producing faster damping response and a softer feel, suited to lighter riders or cooler conditions. 3.5W is thicker, offering more damping resistance per stroke, which suits heavier riders or riders who prefer a firmer suspension feel.\u003c\/p\u003e\n\u003ch3\u003eCan I use fork oil in a rear shock absorber?\u003c\/h3\u003e\n\u003cp\u003eShock oil and fork oil share similar base chemistry but are formulated differently. Shock absorbers run at higher pressures and temperatures than fork legs, so using a fluid specifically rated for shock absorber use, such as Putoline GPR6 or Motul Factory Line, protects seals and maintains consistent damping across the operating range.\u003c\/p\u003e\n\u003ch3\u003eHow often should motorcycle suspension fluid be replaced?\u003c\/h3\u003e\n\u003cp\u003eMost manufacturers recommend changing shock oil every 2 years or 20,000 km as a standard service interval. Aggressive riding, track use, or enduro conditions accelerate fluid degradation and shorten that interval. Discoloured or foamy fluid is a reliable sign that a change is overdue regardless of mileage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n \"@context\": \"https:\/\/schema.org\",\n \"@graph\": [\n  {\n   \"@type\": \"CollectionPage\",\n   \"@id\": \"https:\/\/sharkleathers.com.au\/collections\/suspension-fluid#webpage\",\n   \"url\": \"https:\/\/sharkleathers.com.au\/collections\/suspension-fluid\",\n   \"name\": \"Suspension Fluid\",\n   \"isPartOf\": {\n    \"@type\": \"WebSite\",\n    \"name\": \"Shark Leathers\",\n    \"url\": \"https:\/\/sharkleathers.com.au\"\n   },\n   \"breadcrumb\": {\n    \"@id\": \"https:\/\/sharkleathers.com.au\/collections\/suspension-fluid#breadcrumb\"\n   },\n   \"mainEntity\": {\n    \"@id\": \"https:\/\/sharkleathers.com.au\/collections\/suspension-fluid#itemlist\"\n   }\n  },\n  {\n   \"@type\": \"BreadcrumbList\",\n   \"@id\": \"https:\/\/sharkleathers.com.au\/collections\/suspension-fluid#breadcrumb\",\n   \"itemListElement\": [\n    {\n     \"@type\": \"ListItem\",\n     \"position\": 1,\n     \"name\": \"Home\",\n     \"item\": \"https:\/\/sharkleathers.com.au\/\"\n    },\n    {\n     \"@type\": \"ListItem\",\n     \"position\": 2,\n     \"name\": \"Suspension Fluid\",\n     \"item\": \"https:\/\/sharkleathers.com.au\/collections\/suspension-fluid\"\n    }\n   ]\n  },\n  {\n   \"@type\": \"ItemList\",\n   \"@id\": \"https:\/\/sharkleathers.com.au\/collections\/suspension-fluid#itemlist\",\n   \"name\": \"Suspension Fluid\",\n   \"url\": \"https:\/\/sharkleathers.com.au\/collections\/suspension-fluid\",\n   \"itemListElement\": [\n    {\n     \"@type\": \"ListItem\",\n     \"position\": 1,\n     \"name\": \"Putoline GPR6 Shock Oil - 2.5W\"\n    },\n    {\n     \"@type\": \"ListItem\",\n     \"position\": 2,\n     \"name\": \"Putoline GPR6 Shock Oil - 3.5W (20L) (74284)\"\n    },\n    {\n     \"@type\": \"ListItem\",\n     \"position\": 3,\n     \"name\": \"Putoline GPR6 Shock Oil - 2.5W (1L) (70177)\"\n    },\n    {\n     \"@type\": \"ListItem\",\n     \"position\": 4,\n     \"name\": \"Putoline GPR6 Shock Oil - 3.5W (1L) (70178)\"\n    },\n    {\n     \"@type\": \"ListItem\",\n     \"position\": 5,\n     \"name\": \"MOTUL FACTORY LINE SHOCK OIL VI400 - 1 Litre\"\n    }\n   ]\n  },\n  {\n   \"@type\": \"FAQPage\",\n   \"@id\": \"https:\/\/sharkleathers.com.au\/collections\/suspension-fluid#faq\",\n   \"mainEntity\": [\n    {\n     \"@type\": \"Question\",\n     \"name\": \"What is the difference between 2.5W and 3.5W shock oil?\",\n     \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"The number refers to viscosity grade. 2.5W is thinner, producing faster damping response and a softer feel, suited to lighter riders or cooler conditions. 3.5W is thicker, offering more damping resistance per stroke, which suits heavier riders or riders who prefer a firmer suspension feel.\"\n     }\n    },\n    {\n     \"@type\": \"Question\",\n     \"name\": \"Can I use fork oil in a rear shock absorber?\",\n     \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"Shock oil and fork oil share similar base chemistry but are formulated differently. Shock absorbers run at higher pressures and temperatures than fork legs, so using a fluid specifically rated for shock absorber use, such as Putoline GPR6 or Motul Factory Line, protects seals and maintains consistent damping across the operating range.\"\n     }\n    },\n    {\n     \"@type\": \"Question\",\n     \"name\": \"How often should motorcycle suspension fluid be replaced?\",\n     \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"Most manufacturers recommend changing shock oil every 2 years or 20,000 km as a standard service interval. Aggressive riding, track use, or enduro conditions accelerate fluid degradation and shorten that interval. Discoloured or foamy fluid is a reliable sign that a change is overdue regardless of mileage.\"\n     }\n    }\n   ]\n  }\n ]\n}\n\u003c\/script\u003e","products":[{"product_id":"motul-factory-line-shock-oil-vi400-1l","title":"MOTUL FACTORY LINE SHOCK OIL VI400 - 1 Litre","description":"100% Synthetic - Ester \n- Shock absorber hydraulic fluid \n- Extremely high Viscosity Index provides the best shock absorption on racing bikes","brand":"MOTUL","offers":[{"title":"Default Title","offer_id":46122916511988,"sku":"16-615-01","price":42.46,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/9026\/2516\/files\/68088.jpg?v=1779779053"},{"product_id":"ptsogpr635w1l","title":"Putoline GPR6 Shock Oil - 3.5W (1L) (70178)","description":"\u003cp\u003ePutoline Oil is a Dutch manufacturer and supplier of high-quality oils and lubricants developed specifically for motorcycles, scooters and quads, making Putoline unique. Almost 50 years of experience and continual research allows Putoline to provide cutting edge products. Manufacturing their own products guarantees consistently high-quality motorcycle oils. Putoline Oil, Driven by Technology!\u003c\/p\u003e\r\n\u003cp\u003eGPR6 3.5W is a special shock absorber oil for competition purposes. The addition of special additives gives GPR6 the following properties:\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eUnsurpassed lubrication\u003c\/li\u003e\r\n\u003cli\u003eReduces friction\u003c\/li\u003e\r\n\u003cli\u003eMore direct feel between tyre and road surface\u003c\/li\u003e\r\n\u003cli\u003eCounteracts foaming\u003c\/li\u003e\r\n\u003cli\u003eVery stable viscosity\u003c\/li\u003e\r\n\u003cli\u003ePrevents loss of absorption\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cp\u003e\u003cstrong\u003eProperties:\u003c\/strong\u003e\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eDensity 15°C: 0.87kg\/L\u003c\/li\u003e\r\n\u003cli\u003eViscosity 40°C: 12.8mm²\/s\u003c\/li\u003e\r\n\u003cli\u003eViscosity 100°C: 4.86mm²\/s\u003c\/li\u003e\r\n\u003cli\u003eViscosity Index: 378\u003c\/li\u003e\r\n\u003cli\u003eFlash Point: 110°C\u003c\/li\u003e\r\n\u003cli\u003ePour Point: -60°C\u003c\/li\u003e\r\n\u003cli\u003eAcid Number: 2mgKOH\/g\u003c\/li\u003e\r\n\u003c\/ul\u003e","brand":"PUTOLINE","offers":[{"title":"Default Title","offer_id":46752862929140,"sku":"PTSOGPR635W1L","price":49.99,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/9026\/2516\/files\/PTSOGPR635W1L.jpg?v=1780057601"},{"product_id":"ptsogpr625w1l","title":"Putoline GPR6 Shock Oil - 2.5W (1L) (70177)","description":"\u003cp\u003ePutoline Oil is a Dutch manufacturer and supplier of high-quality oils and lubricants developed specifically for motorcycles, scooters and quads, making Putoline unique. Almost 50 years of experience and continual research allows Putoline to provide cutting edge products. Manufacturing their own products guarantees consistently high-quality motorcycle oils. Putoline Oil, Driven by Technology!\u003c\/p\u003e\r\n\u003cp\u003eGPR6 2.5W is a special shock absorber oil for competition purposes. The addition of special additives gives GPR6 the following properties:\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eUnsurpassed lubrication\u003c\/li\u003e\r\n\u003cli\u003eReduces friction\u003c\/li\u003e\r\n\u003cli\u003eMore direct feel between tyre and road surface\u003c\/li\u003e\r\n\u003cli\u003eCounteracts foaming\u003c\/li\u003e\r\n\u003cli\u003eVery stable viscosity\u003c\/li\u003e\r\n\u003cli\u003ePrevents loss of absorption\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cp\u003e\u003cstrong\u003eProperties:\u003c\/strong\u003e\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eDensity 15°C: 0.844kg\/L\u003c\/li\u003e\r\n\u003cli\u003eViscosity 40°C: 6.66mm²\/s\u003c\/li\u003e\r\n\u003cli\u003eViscosity 100°C: 2.95mm²\/s\u003c\/li\u003e\r\n\u003cli\u003eViscosity Index: 438\u003c\/li\u003e\r\n\u003cli\u003eFlash Point: 92°C\u003c\/li\u003e\r\n\u003cli\u003ePour Point: -60°C\u003c\/li\u003e\r\n\u003cli\u003eAcid Number: 1.7mgKOH\/g\u003c\/li\u003e\r\n\u003c\/ul\u003e","brand":"PUTOLINE","offers":[{"title":"Default Title","offer_id":46752863060212,"sku":"PTSOGPR625W1L","price":49.99,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/9026\/2516\/files\/PTSOGPR625W1L.jpg?v=1780156141"},{"product_id":"ptsogpr635w20lb","title":"Putoline GPR6 Shock Oil - 3.5W (20L) (74284)","description":"\u003cp\u003ePutoline Oil is a Dutch manufacturer and supplier of high-quality oils and lubricants developed specifically for motorcycles, scooters and quads, making Putoline unique. Almost 50 years of experience and continual research allows Putoline to provide cutting edge products. Manufacturing their own products guarantees consistently high-quality motorcycle oils. Putoline Oil, Driven by Technology!\u003c\/p\u003e\r\n\u003cp\u003eGPR6 3.5W is a special shock absorber oil for competition purposes. The addition of special additives gives GPR6 the following properties:\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eUnsurpassed lubrication\u003c\/li\u003e\r\n\u003cli\u003eReduces friction\u003c\/li\u003e\r\n\u003cli\u003eMore direct feel between tyre and road surface\u003c\/li\u003e\r\n\u003cli\u003eCounteracts foaming\u003c\/li\u003e\r\n\u003cli\u003eVery stable viscosity\u003c\/li\u003e\r\n\u003cli\u003ePrevents loss of absorption\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cp\u003e\u003cstrong\u003eProperties:\u003c\/strong\u003e\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eDensity 15°C: 0.87kg\/L\u003c\/li\u003e\r\n\u003cli\u003eViscosity 40°C: 12.8mm²\/s\u003c\/li\u003e\r\n\u003cli\u003eViscosity 100°C: 4.86mm²\/s\u003c\/li\u003e\r\n\u003cli\u003eViscosity Index: 378\u003c\/li\u003e\r\n\u003cli\u003eFlash Point: 110°C\u003c\/li\u003e\r\n\u003cli\u003ePour Point: -60°C\u003c\/li\u003e\r\n\u003cli\u003eAcid Number: 2mgKOH\/g\u003c\/li\u003e\r\n\u003c\/ul\u003e","brand":"PUTOLINE","offers":[{"title":"Default Title","offer_id":46752862961908,"sku":"PTSOGPR635W20LB","price":839.99,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/9026\/2516\/files\/PTSOGPR635W20LB.jpg?v=1780225396"},{"product_id":"ran_ptsogpr625w","title":"Putoline GPR6 Shock Oil - 2.5W","description":"\u003cp\u003eGPR 6 2.5W is a special shock absorber oil for competition purposes. The addition of special additives gives the product the following properties:\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eUnsurpassed lubrication\u003c\/li\u003e\r\n\u003cli\u003eReduces friction\u003c\/li\u003e\r\n\u003cli\u003eMore direct feel between tyre and road surface\u003c\/li\u003e\r\n\u003cli\u003eCounteracts foaming\u003c\/li\u003e\r\n\u003cli\u003eVery stable viscosity\u003c\/li\u003e\r\n\u003cli\u003ePrevents loss of absorption\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cp\u003e\u003cstrong\u003eTypical standard analyses:\u003c\/strong\u003e\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eDensity at 15 °C, kg\/l: 0.844\u003c\/li\u003e\r\n\u003cli\u003eViscosity 40 °C, mm²\/s: 7.01\u003c\/li\u003e\r\n\u003cli\u003eViscosity 100 °C, mm²\/s: 3.11\u003c\/li\u003e\r\n\u003cli\u003eViscosity Index: 443\u003c\/li\u003e\r\n\u003cli\u003eFlash Point PM, °C: 95\u003c\/li\u003e\r\n\u003cli\u003ePour Point, °C: -54\u003c\/li\u003e\r\n\u003c\/ul\u003e","brand":"PUTOLINE","offers":[{"title":"15L","offer_id":47866485997812,"sku":"PTSOGPR625W15L","price":629.99,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/9026\/2516\/files\/PTSOGPR625W15L.jpg?v=1780179809"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/9026\/2516\/collections\/PTSOGPR625W15L.jpg?v=1780940612","url":"https:\/\/sharkleathers.com.au\/collections\/suspension-fluid.oembed","provider":"Shark Leathers","version":"1.0","type":"link"}