a few questions about oil types!
 

whats up.... i do all my oil changes at home and i always use CASTROL GTX... i was wondering if there was a better type of oil i could use instead...if you guys have any suggestions i would appreciate it! thanks!....

Well, i really like Royal Purple, a little pricybut its worked well for me. i used to use the synthethic for my turbo dsm. i guess it has alot to do with ones own opinion

should post this in the tech garage or rx-8 general discussion...but I use castrol gtx 10w-30

CASTROL GTX IS fine as long as you are changing out the oil like your supposed to and checking oil level like your supposed CASTROL will work fine

oil types are all good. why cant we all get along????


beers :beer:

Valvoline 5W20, I follow the manual.

I use Mobil 5w20. I used to use Casterol GTX in my grand prix when I had it. I'd use either of those based solely on semi-blind brand loyalty. I think people put too much hype in oil brands, for the most part. If you race all the time then I see it being a factor, but not so much for normal drivers.

MOBIL 1 5w20 Mobil 1 Filter Mobil 91

Royal Purple 5-20 since the first oil change. I use a Pella pump for oil extraction and I use either an OEM or Mobil 1 oil filter. I only change my oil every 7500K miles.

I started putting in one bottle of Techron in the gas tank before every oil change. I may try the Sea Foam.

None better. Plus, they sponsor John Force, so you're doing God's work by supporting them.

Ken

Royal Purple is hands down the best(at least in my opionion but would not use it for everyday driving just cause of the cost) I personally use 5w30 Castrol but did try Valvoline last time and it's workin great also Brand is not a huge concern (as long as it's not "Mr. Oil's Premium Oil" or something like that....

The Valvoline conventional oils have a some what high ash percentage compared to Castrol oils of the same weight. Typically most Valvoline conventional oils in a 5W20 or 5W30 have a ash level of around 1% (1 percent of the oil after burning is left as ash) while Castrol does not have a conventional GTX oil that exceeds .81% ash left.

Other than that Castrol and Valvoline conventional oils are very simular.

But remember since oil is injected and burned in a Rotary engine, you will want to use the oil with the lowest ash percentage to help avoid the build up that can cause compression and exhaust port issues.

And as a simple reference, Valvoline Synthetics typically has a ash percentage of 1.5% and most Royal Purple motor oils have around a .75%.

that seems to be some good info for the long run. I didn't know anything about ash percentage. Where can you find this info for different oils? Is there a big master test published somewhere or is it listed on the oil bottle somewhere?