quote:Yes you COULD use this oil in your car. Will it void warrenty? these days if you sneeze on your engine its likely to void your warrenty so you can take your chances. Luckily, if you have evidence that your engine failure wasn't caused by the oil (UOA works great), you'll win.
Originally posted by Mystic: buster can you use this oil in just a regular car that requires 5W-30 to meet warranty? I have heard repeatedly how good of an oil this is but as far as I know it is available only in 5W-40, maybe 10W-30, and 15W-40 or 15W-50. Also, where do you find the oil?
quote:I've been using M1 15W-50 for the past two winters with no problem. Last winter I used it "straight" down to about 12°F, & this winter I used it with about 20%-25% 5W-30 semi-syn mixed in (meaning: 5W-30 semi-syn won't cold-flow as well as 5W-xx full syn) down to 0°F. Cold starting with M1 5W-40 should be easy.
Originally posted by novadude: ... Is the viscosity too high for cold temps?