Quote:
Originally Posted by Bill Verburg
SG hasn't been available since 1993 SH 1996
Current M1 V-twin is SJ and while it is the correct 20w/50 weight has more ZDDP than i desired except for a break in oil, it's P spec is 1750ppm and Zn is 1850
minimmum ZDDP specs for our cars want to be ~1000ppm
M1 Racing 4T 10w/40 is 1200/1300 a very good place to be
M1 turbo Diesel 5w-40 is 1100/1300
M1 truck & SUV 5w-30 is not only too light it's spec is 800/900
Plain ole M1 15w-50 whicch is what I have used for a few decades is 1200/1300
Driven Brad Penn(now called Penngrade 1) also have excellent oils that I've occasionally used
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eegaad... I had to go back and look at the bottle that I bought a week ago for my R50/5
mobil 1 vtwin is rated SJ but they also say it covers SG and SH
"recommended by ExxonMobil for applications requiring API SH, SG, CF"
https://www.mobil.com/en/lubricants/for-personal-vehicles/our-products/products/mobil-1-v-twin-20w-50/?utm_source=bing&utm_medium=cpc&utm_campaign=PVL_Traffic_Brand_Mobil1_General_Exac t&utm_content=Product_General_V-Twin&utm_term=mobil%201%20v-twin&gclid=b791006165c11a520272606b0a606e93&gclsrc=3p.ds&msclkid=b791006165c11a520272606b0a606e93
and Redline says SJ/SG/SH JASO MA/MA2 for their mc oil
https://www.redlineoil.com/20w50-motorcycle-oil
so I think we officially have an oil thread
edit: take Castrol 4T off my recommendation. Its only SL. You can't go wrong with the other two but you will pay a pretty penny for 12 quarts, especially if you run Redline