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Mixing Synthetic & Dino Oil
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Originally posted by TheCafeKid View Post1983 GS 1100E w/ 1230 kit, .340 lift Web Cams, Ape heavy duty valve springs, 83 1100 head with 1.5mm oversized SS intake valves, 1150 crank, Vance and Hines 1150 SuperHub, Star Racing high volume oil pump gears, 36mm carebs Dynojet stage 3 jet kit, Posplayr's SSPB, Progressive rear shocks and fork springs, Dyna 2000, Dynatek green coils and Vance & Hines 4-1 exhaust.
1985 GS1150ES stock with 85 Red E bodywork.
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Grandpa
5W40 Rotella on the 129,500-mile GK. 800-mile trip, warm temps, a half pint used. Runs great.
This oil is what I use in cold and hot weather.
But the important thing is to keep level up. Topping off 5W40 Rotella with dino 10W40 is perfectly fine. We don't leave the oil in there much longer than 2,000 miles anyway, whether dino or synthetic.
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Grandpa
Exactly the same. No difference at all. I just ride, worryfree. Too many worrywarts on this forum.
I seldom let it go beyond 2,000 miles; usually I change it between 1,500 and 2,000, a wide window, depending on when it's convenient for me to do so.
Again, no difference in shifting or anything else, whether 200 miles after the change, or 2,000.
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Forum LongTimerBard Award Winner
GSResource Superstar
Past Site Supporter- Jul 2005
- 15152
- Marysville, Michigan
The reason I asked is I have two gallons of it to test. I have used quaker state 10w40 and at about 8-900 miles the shift gets clunky, rotella "t" 15w40 goes 1900-2000 miles, amsoil 20w50 over 4k and still going strong.
I will change it tonight to rotella 5w40 which should be the best bang for the money imho.
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