High mileage oil??

[elk_hunter]

Hey all,

 

Getting ready to change oil in my 99 gmc. And while at the store I saw penzoil now has 5w-30 oil for high mileage over 75,000. Well i'm at 76,000 in my truck and just wondering if this helps or does anything better then there standard 5w-30 oil. It's $3.50 more for the 5 quart .

 

thanks alot!!!

 

[tmf6902]

I used it in the blazer, never really noticed a difference in power, or leakage, or smoke, or anything, but I always figured, that a couple of bucks more, is worth it if it'll make my engine last a few thousand miles more. but as far as performance wise or leakage...no it didn't seem to help any. but I still buy it......it's still cheaper than synthetic

[Wayne2]

So what is in the oil to make it better for higher mileage engines?

[plrod]

It's all about marketing IMHO; I run a heavier weight oil in my higher mileage vehicles. IE; my 89 K2500 @ 133K gets 15-40W while the wifes 99 burb with 75K still gets 10-30W, 5-30W in the winter; more important to use a grade consistant with your ambient temps.

[Wayne2]

Always did make sense to me to put a heavier weight oil in an engine that was showing signs of wear but I was wondering if they were actually using a different additive package in oils advertised for "higher mileage engines".

[RossT]

Maxlife does use a different additive package. I am unsure about the other brands, they just might be a heavier oil. visit www.bobistheoilguy.com and click on forums. Anything and everything you wanted to know about oil is in those forums.

 

Maxlife initially had really good additive package, but I think that it has been changed slightly recently. They lowered the amount of moly. in it or something like that.

 

If it were my truck, I would run a mild ester cleaner thru the oil such as auto-rx and continue to use the oil that you have been using.

 

Good luck.

[Black02Silverado]

I agree with RossT got to bobistheoilguy and check it out. This link will take you to the forum section. There is a ton of lubrication information on that site.

 

I have used Auto RX and it works well. The best part is it works slowly but efficently.

[GnatGoSplat]

I have never owned a car in my life with < 75,000 miles and I've never had any oil-related problems using regular oil up to 200,000 miles.

 

IMO, like many things in life, it's just a marketing gimmic thought up by the marketing people in a large corporation in the hopes that their useless product will bring more of your hard-earned income into their pockets so they can afford bigger houses, more expensive cars, and that membership at the country club.

[revrnd]

From what I can understand about these "high mileage" oils is that they have an additive to swell the seals & gaskets, preventing leaks.

[GnatGoSplat]

I have never had a late-model car or truck that leaked a single drop of oil between 100,000-200,000 miles.

Transmission fluid, on the other hand, is a whole 'nother story.