difference from switching to royal purple synthetics?

AmericanMuscle4.6GT · 11-19-2007, 12:51 AM

has anyone switched from the motorcraft that ford uses to royal purple? did u notice a difference?

dr350rider · 11-19-2007, 01:01 AM

I run Royal Purple in the engine of my 2005 GT. I will always use it from now on. I noticed a performance difference. The engine revs easier. First I went to Mobil 1 and then to Royal Purple. I feel a difference with Royal Purple over Mobil 1. I was thinking about running Royal Purple in the rear end and transmission one of these days. I noticed Ford uses a synthetici in the rear end. It may be high quality. Do you know of a benefit to switching to Royal Purple in the diff?

ChiDiddy · 11-19-2007, 01:01 AM

dont expect HP gains from switching to synthetic. Expect things to run a bit smoother.

I recommend Amsoil or Mobil1 over RP though. Although if u're interested in RP, i have a case of 12qts here to sell.

Soc06Stang · 11-19-2007, 01:01 AM

i'm curious in this too, i've been told there is a difference.

rmays06 · 11-19-2007, 01:04 AM

Could you expound on that answer please....lol why no on RP and yes on Mobil1 arent' they the same grade?

Quote:

ORIGINAL: ChiDiddy

dont expect HP gains from switching to synthetic. Expect things to run a bit smoother.

I recommend Amsoil or Mobil1 over RP though. Although if u're interested in RP, i have a case of 12qts here to sell.

AmericanMuscle4.6GT · 11-19-2007, 01:50 AM

well im switching out the engine, tranny, and rear end fluids, as well as putting a performance oil filter on. we'll see. from having the motorcraft oil with 500 miles over the limit to having fresh royal purple, i better notice a difference.

ChiDiddy · 11-19-2007, 02:08 AM

reposting. i've said it many times already since i've been here. based off my personal tests. feel free to do your own independant oil analysis. Its only $20, google blackstone labs.

Quote:

ORIGINAL: ChiDiddy

Group IV or not, M1 is still doing a stellar job. Especially when it comes to protecting the life of turbo seals, which i've seen RP fail at several times. I've had a personal oil analysis done on my 1 time run with RP, and resulted in almost no active additive remaining at 4000mi. Not to mention it always had a weird burnt smell to it. Whereas, M1 consistently had 5000+ miles and still had active additives remaining. This was done my RSX engine with over 73k miles on it, 20k in which it was boosted. Ran synthetic since 10k.

The shop that i have close relations to (Fast-Lane Inc. of Houston, which makes a twin turbo setup for the s197, featured in http://fastlaneincorporated.com/down..._05_saleen.pdf) also recommends against RP. They've seen many oil seals go out prematurely with the use of RP, including 2 of my friends.

I'm not trying to spark a debate, but again, this my personal experience and my opinion that i have based on from my own test results. To think, i had stockpiled over 20 cases of Royal Purple in my garage at one point. Sold it all for dirt cheap to some locals, and went with M1 and Amsoil. Amsoil is the other great oil, so great that i became a dealer for them

howarmat · 11-19-2007, 04:15 AM

Nothing wrong with RP IMO either, the engine driveline will run smoother with any synthetic....you should feel the difference

zkiller · 11-19-2007, 07:18 AM

Royal Purple all the way.
My SVT dealer uses it in all FI S197 cars and all Cobras and GT500s

ChiDiddy · 11-19-2007, 08:47 AM

i have a case of 12qts or RP 5w-30. anyone wants to buy? pm me for a steal price!