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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
ATF in gear oil (MXA recent issue)
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[QUOTE="Joe-dick, post: 333111, member: 30383"] The "Energy Conserving" refers specifically to the viscosity of the oil and to "long oil change interval" additives in the oil. Thinner oil pumps more easily so you won't see "Energy Conserving" on a 10w40 oil by definition, but the SAE/API designation has more to do with the fact that the later spec oils for gasoline engines (API SI and up if memory serves) are formulated to allow longer oil change intervals in four strokes before sludge production and oil breakdown gets above a certain point. "Energy Conserving" should actually read "Oil Conserving" because that's the real point of the newer designations. This may seem to be getting off-topic but it's actually very much to the point because most of the oils produced to the SI designation and up have smaller amounts of certain metallic compounds which provide good anti-wear properties in a manual gearbox, but tend to contaminate the catalytic convertor in the cars for which they are designed and marketed. I'm not a petroleum engineer; I've run an auto repair shop for quite some time now and I try to keep my ears open. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
ATF in gear oil (MXA recent issue)
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