24-04-2020, 01:54 PM
RPM, In answer to your question how many miles. I don’t know but I have been using it for the last 20 years without problem. I don’t know what oil you use but if it is not a detergent type like all the modern multigrades then you need to flush your engine oil ways out before you use it otherwise the detergent in your new oil will remove all the old sludge and block your oil jets etc. If the oil you use is a detergent oil if it is there will be no problems going to multigrade
John Mason
John Mason
Would you believe it "Her who must be obeyed" refers to my Ruby as the toy.