Royal Purple 5-30 or 10-40?
03-23-2008, 09:19 PM
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5w30 and RP sucks. Use a different oil.
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03-23-2008, 10:56 PM
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RP sucked in my car! I have no complaints on amsoil tso ow-30 i cant say enough about this oil and has blakstone labe reports that show great things on this oil.
03-23-2008, 11:01 PM
#10
their off the counter oil is very average and dangerously thin.
their race oils are pretty good from what i have read.
mobile 1 0w40, german castrol 0w30, pennzoil 10w30 are great for the vq and all can be had off the counter
amsoil 0w30 is a bit harder to find but it is another great choice.
their race oils are pretty good from what i have read.
mobile 1 0w40, german castrol 0w30, pennzoil 10w30 are great for the vq and all can be had off the counter
amsoil 0w30 is a bit harder to find but it is another great choice.
03-24-2008, 07:03 AM
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Originally Posted by idwin
RP sucked in my car! I have no complaints on amsoil tso ow-30 i cant say enough about this oil and has blakstone labe reports that show great things on this oil.
RP never burned a quart when I used it.
Using German Castrol Syntec 0w-30 now.
03-24-2008, 07:50 AM
#13
RP 5W-30 sheared down to a 20 weight oil in four different engines. It also showed higher than average wear in all four engines, and was not a very good oil considering the price.
RP has since reformulated their 5W-30, and it is more robust. Only one person has tried it and posted a UOA. Their mileage was average for the previous samples, but the wear was a lot lower with the new oil. It also stayed in grade.
The new formula looks to be a lot better, but with only one sample, it's still hard to say it's worth the money. Especially when you consider that the average of four Castrol GTX 5W-30 samples have much lower wear than even the new version of RP 5W-30.
Only one person has used RP 10W-40 and had it tested. It also sheared in the VQ, to a really thin 40 weight. Copper and Lead were much higher than average for the mileage put on the oil.
If you change your oil every 3k-5k miles, I couldn't see spending the money on RP when there are better options for less money.
Will
RP has since reformulated their 5W-30, and it is more robust. Only one person has tried it and posted a UOA. Their mileage was average for the previous samples, but the wear was a lot lower with the new oil. It also stayed in grade.
The new formula looks to be a lot better, but with only one sample, it's still hard to say it's worth the money. Especially when you consider that the average of four Castrol GTX 5W-30 samples have much lower wear than even the new version of RP 5W-30.
Only one person has used RP 10W-40 and had it tested. It also sheared in the VQ, to a really thin 40 weight. Copper and Lead were much higher than average for the mileage put on the oil.
If you change your oil every 3k-5k miles, I couldn't see spending the money on RP when there are better options for less money.
Will
03-24-2008, 08:03 AM
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According to this test, the results show that RP is one of the best.
http://www.animegame.com/cars/Oil%20Tests.pdf
I can't say the validity of the testing method though.
http://www.animegame.com/cars/Oil%20Tests.pdf
I can't say the validity of the testing method though.
03-24-2008, 09:22 AM
#15
Originally Posted by WestRace
According to this test, the results show that RP is one of the best.
http://www.animegame.com/cars/Oil%20Tests.pdf
I can't say the validity of the testing method though.
http://www.animegame.com/cars/Oil%20Tests.pdf
I can't say the validity of the testing method though.
The Timken test, when actually done correctly, is designed to reveal the presence of any Extreme Pressure additives in the oil or grease. RP would do well in this test because they use a sulfur additive as a surface hardener, which explains the typically high copper wear found when using RP oils, since sulfur is corrosive to yellow metals.
Will
03-24-2008, 09:23 AM
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Originally Posted by WestRace
According to this test, the results show that RP is one of the best.
http://www.animegame.com/cars/Oil%20Tests.pdf
I can't say the validity of the testing method though.
http://www.animegame.com/cars/Oil%20Tests.pdf
I can't say the validity of the testing method though.
Great thread and it influenced my decision this current oil change.
03-24-2008, 10:11 AM
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Personally I would stay away from RP especially if you are going to be racing your Z. I had 55,000 thousand miles when my motor spun a bearing. I had been using RP since I had 1,200 miles. When inspecting my main bearings they had the wear of a motor that had 120,000+ miles. Granted I did race my Z but other Z's that raced with me had there engines go to 100,000 miles but they were using mobil or other synthetic brands.
03-24-2008, 11:14 AM
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03-24-2008, 12:13 PM
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I used RP 5-30 and I was very happy with the performance, milage and life. It didn't burn off fast like the M1 and I never had problems with oil burnoff, so I can't really help you out. I'm running amsoil, very good oil like it better than RP and it has a great rep.