alt Posted November 11, 2007 Report Share Posted November 11, 2007 What petrol/oil ratio do folks use nowadays with synthetic and semi-sythetic oils?I seem to recall using 32:1 with semi -synthetic back in the early eighties.Also ,what is the recommended sparkplug for a 199?Can anyone help?Cheers,Alt. Quote Link to comment Share on other sites More sharing options...
dgshannon Posted November 11, 2007 Report Share Posted November 11, 2007 What petrol/oil ratio do folks use nowadays with synthetic and semi-sythetic oils?I seem to recall using 32:1 with semi -synthetic back in the early eighties.Also ,what is the recommended sparkplug for a 199?Can anyone help?Cheers,Alt. With modern full-synthetics, it is common to run 60:1. I have been doing so with my 1974 Cota 247 for years. I know others that have had no problem at 70:1. The one that blows my mind is a riding buddy who runs Amsoil at 100:1, and has for several years now. His 1976 Sherpa T 350cc was restored by a notable Bultaco shop, and they are the ones who instructed him that this oil and mixture was appropriate. I just can't go to that extreme, but have done 70:1 now and then. Point being, you are perfectly safe at 60:1 with a modern fully synthetic oil. Quote Link to comment Share on other sites More sharing options...
gregr Posted November 11, 2007 Report Share Posted November 11, 2007 Hi Alt Am running 50:1 [or 2%] Bel-Ray Semi-Sythetic in my 198 lump , fired it up for the first time today and its nice n clean ... Hope that helps , Greg Ps, If you google ... "pre-mix ratios" you should get a few sites with a fuel to oil ratio calculator ! Quote Link to comment Share on other sites More sharing options...
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