ok 2 questions. i have a 86 camaro z28 with an LG4 engine this upcoming weekend im goin 2 be doin some major fluid changes oil,transmission and rear axle. my first question is, will synthetic oil hurt my engine? i'll be goin w/ mobil 1 if it will not, also i am wanting 2 switch my rear axle 2 royal purple synthetic is this a good idea? second question, my oil gauge does not work and where ever i go the give me the same sensor piece witch does not fit. and thing specific i can ask 4?

 

Synthetic won't hurt, just cost more. If your motor is stock, I wouldn't pay the extra money.

-Rippin

 

i've heard that synthetic is thinner which can cause an engine 2 have leaks where it hasn't leaked in the past

 

no one ever believed me but mechanicz is absolutley correct it will leak. use regualr oil is fine

 

How can synthetic be thinner? 5W30 is 5W30 whether synth or mineral. I had a 91 190E 2.6 Benz that used mineral and I switched to synth and it never leaked a drop on the floor and didn't use any more than normal. In fact, the most wasted oil was when I spilt it.

It might have more detergents in it and clean out the sludge and now it leaks but on any engine in good condition, I have never see it leak. MB uses 0W40. In 2000 they switched to 0W40 for their cars that didn't have it and that never caused a problem.

 

In turbo apps, I would use synth but for your situation, no. My car gets beat on enough so I use it for the extra bit of protection. Besides LPE and Callaway both recommend it.