well after alot of research (and i get a fat discount) on royal purple oil i decided to change the dino oil out to synthetic. initially i didnt notice much but after about 50 miles of driving im starting to notice a difference, the car revs smoother accelerates smoother and just the over all driving experience is alot smoother. did it add hp? it sure feels like it. could just be because i changed the oil, or royal purple really does what it says. either way i like it and i will continue to use it. 04 w/40k miles used 5w30

 

I have been running royal purple for 20k miles now i think and i love it! Just rolled into 97K miles and switched from 5w-30 to 10w-30 and what a difference. Everything seems "sealed" now.

Royal Purple FTMFW!!!

-Sean

 

Royal Purple

 

so it is OK to switch to full synth after 40k? I have 47k and I was told that I couldn't because it would mess up the seals in the motor..

 

whoever told you that is a tool.
-GP-

 

or I am a tool for believing it.. So I am going to be ok switching?...

 

no you're just not as knowledgeable as some one that knows cars well. You will be perfectly fine to switch to synthetic at 47k, especially if you're switching to Royal Purple.
-GP-

 

FWIW, this comes from an Amsoil site, but these findings explain the difference you feel.
http://www.performancemotoroil.com/R...rple_info.html

The higher volatility is probably due to a lower grade basestock boosted with the moly additive to appear to be a superior lubricant (for a while at least). Another option is the German Lubrimoly. http://www.liqui-moly.com/web/lmhome...es/index_flash

Some NAPA stores have it.


Moly Disulfide is a very good solid lubricant/friction modifier, but it is generally not recommended for long service as it can begin to precipitate as the additives intended to prevent that deplete. Its a short-term racing lube that likely adds a few HP by reducing internal friction, but just don't expect to keep it in for more than the 3000 mile mark. And think twice about using it with a very efficient filter that have absolute ratings in sub-10 micron range. It wont take long to blind the filter and cause it to go into bypass mode and make it totally ineffective. BTW, I have nothing to do with Amsoil and I don't even use it in my cars. I do use their excellent 10W/40 motorcycle oil year-round and it does the job.

 

would you mind telling me who your hook up is?

 

+1... Group Buy????
-GP-

 

I use 10W-40...but it gets hot in Atlanta! I love Royal Purple, been using it for years on all my cars.

 

Anyone reading this? It's one of the best posts on oil I've read on this forum.