Quote Originally Posted by 97GSRb18
use the regular stuff do you'r oil changes on time, save money, always have clean oil, clean oil means clean motor, clean motor means beter gas mileage, OK u get the point all I'm saying is synthetic is made to last what 5,000 miles rather then the average 3,000 but its like 4 times as much do the math....
no matter how often you change a lower grade oil there is going to be buildup with it...I'd still rather use a better oil and change it just as much

I'm looking at making a formula using a real synthetic made for diesel engines, they seem to have the most detergents but I'm trying to figure out what mixing it with an ester based oil will do. Technically will be a group IV-V oil. Just have to keep all the tolerences within spec for our climate.