hey everyone i have another question which motor oil is better for high mileage truck would yall use oil for high mileage or full syntec. and what are some of the best brands i hear people talk about royal purple but i have never tried it ... so i was wondering if anyone eles had .. and they liked it .... and i have also heard that if ur trucks runnin conventional oil u have to gradually work up to full syntec by going to the syntec blend first is that also true j.w

 

oh and just incase yall might wonder my truck has 98,000 miles on it

 

I like Royal Purple. I run it in all my vehicles and have never worked up to it. I just switched. I still change my oil every 3k miles though. If you plan to leave it in there long periods of time might be a good idea to change it soon the first few times. As in like 3k miles. A lot of times I hear guys saying switching to a synthetic causes leaks on higher mileage vehicles so it's up to you if you want to try or not. Some don't have a issue some do.

 

ok thanks and ya i do my own oil changes every 3k miles or evern sooner in some cases never over..... and the guy that owned this trucke before me beofre he sold it to me he told he got the oil done but he got it done at walmart with thier crappy walmart brand oil ..... so its not due till october but i dnt want that junk in there....

 

I just switched to RP.This has only been my first oil change since I bought the truck though so I can't comment on how I like it yet,but I have always heard good things about it.

 

i work at a napa store and i see people constantly come in asking specifically for royal purple. its in the vicinity of 8 dollars a quart which is outrageous. i refuse to but into the full synthetic thing, i change my conventional oil religiously and i have never had an issue, but hey to each their own

 

Just one of many opinions and something to think about, but, from Amsoil.http://bestsyntheticoil.com/dealers/amsoil/seals.shtml

 

thanks everyone for your help i think i will try RP and see how it works hopefully my ram wont leak after i change it but we wil lsee what happens

 

My Napa was selling it for $6.99 or something a quart. Seemed like more when I bought a case last time but not sure. Wal-Mart here has a 5-30w for a little cheaper. In the high $6 range. Advance also sells it but is more. It's not cheap but I don't mind paying if I'm getting a superior oil. I've probably been running it in my truck the last 40k or so. I've been using it for a long time.

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The only brand of Amsoil that is API certified is the XL-7500 series as far as I know. The others contain too much ZDDP and don't meet the API certification standards. Phosphorous have been accused of premature catalytic converter failures.

I'm not accusing Amsoil of being a bad product by any means, but I'll be darned if I'll loose my cat warranty for using an uncertified oil.