a few questions about oil types!
10-13-2008, 12:57 PM
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insidious
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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!....
10-13-2008, 05:55 PM
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Chi's Finest
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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
10-25-2008, 12:51 PM
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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.
10-25-2008, 01:12 PM
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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.
I started putting in one bottle of Techron in the gas tank before every oil change. I may try the Sea Foam.
Last edited by b'Eight'; 10-25-2008 at 01:15 PM.
10-25-2008, 02:46 PM
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Ken
10-25-2008, 07:57 PM
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Rotary Powered Countryboy
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....
10-26-2008, 01:26 AM
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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%.
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%.
10-26-2008, 12:58 PM
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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?
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