Wha

I really like reg penns oil have used it all my life , and never had an engine go down , and ive had all makes and models, had a trucking company one time , and used penns oil , and we got a better price for chevron dello 400, we had major engine meltdowns , and had to go back to pennsoil , and never had trouble again , some people may have good luck with synthetic , but i have to stay with what i know best,

Synthetic is very good in turbo charged engines because of the heat the turbo builds up , in regular oil the vascosities will crystalize in the turbo fan when the car is turned off soon after a boost and eat up the turbo barrings in the turbo fan
true synthetic oil last long between changes but cost more also , personally i dont use synthetic because of the price if it was less expensive i would use it , it is a very good lubricant