much agreed here.ive heard you shouldnt mix weights of oil but i have on my everyday cars,the twenty plus years of driving and changing oils on a regular 3000 mile interval,ive had virtually no engine wear issues!
currently i change oil for mother in law car and my 7 vehicles, so many times i use what i have.but for the chevelle i have it gets nothin less than brad penn 20-50.great for staying slippery seeing as i put nitrous in 'er
