Havent you learned your lesson with fully synth???Castrol GPS semi synth, wont go far wrong with that
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"Food makes people fat - look at the people in the concentration camps... they went in fat but they weren't fat when they left. It's simple innit."
J Thats all you've realy got to worry about apart form the correct SAE viscosity.
Just make sure your semi synth has an API code higher than API SG. SG is 1995, SH 1996 etc.
errrr - what??? they're different grades of additves (like you said) - they don't correspond to different years of manufacture!! (do they???)
Not found its thsat simple (to my cost) if a bike has been previously run on a low detergent oil not correctly maintained then slopping in some modern high detergent oil in will wash all the accumlated shite stright thru the mains. Ok so the is bike aint covered any mileage to speak of (my genesis has covered 96K miles on car semi and all parts except top gear where quite servicable) but i put some ordinary semi in a GPZ5 about 2 years ago that had covered about 45K and it destroyed the mains and big ends in short order. Since then ive been very carefull of modern oils.Kev
Yep....nearly...it wobbles a bit.soz if i mislead you previously...'well aint that typical of me'...again.. They are always improving the addatives, year after year. Not different grades but improved packages its the same basic mineral oils, as (viscosity wise, their always improving the polymers as well) the previous years but slightly improved to keep up with higher performance demands needed by the engineers....and all that.
I have now changed to Halfords Semi. The synth was like water when it came out Still sounds like a bag of nails but I suspect a valve job and carb balance will sort that out.
They are quite noisy engines once warmed up. I've done valves and carbs and recently changed the oil too. Stops when the clutch is pulled in which suggests it's mostly clutch or transmission noise.
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