Nobsany

my mechanic has recommended the addition of Prolong in my oil. He is of the opinion that it will boost the performance of my high mileage engine. WHAT DO YOU GUYS THINK?

pocholin

It depends, if you already use synthetic oil, don't use it, if you use regular oil it won't hurt, it might actually help a little.

nellee

I have used it in my Jeep Grand Cherokee and my former Acura Integra (traded it in for the CLK) every time I changed my oil (regular 10w-30, not synthetic).

It makes the car run smoother and quieter for about a week. I am usually late to work in the mornings so I don't warm up the Jeep too long, less than a minute most times, so I feel more secure knowing that I've added something to the engine that supposedly protects the engine better than just oil by itself.

I wouldn't think it would hurt the engine, but it does cost about $20 per shot.

I agree that if you're already using synthetic, then it probably won't help as much.

sLickfITY

How about that V6 Engine Restorer that has ads in the magazines with the black/silver label? they sell it at Pepboys, autozone, etc. and it also comes in 4 cyl and V8. does that stuff work?