+1 mobile 1 5-30 fully syntec its the best!

 

well theres different kinds of oil out there.. everyone doesnt use the same oil, so you cant come in here telling me about numbers... i just want to know if its worth the extra dough, i never said im not gonna spend 25$ every 5k miles.

 

Just don't use canola oil!!

 

a show called Top Dead Center tested a conventional oil and Royal purple and with a temp gun showed how royal purple reduced the internal temp of the engine in certain parts. It lowers the internal friction so much the it reduces heat and increases Hp, oh yeah more miles per gallon too. 06' book says 5w30. Use Royal purple, it's cheap insurance

 

I use Mobil 1 5w30, as recommended by my local dealership.

 

I use Motul 300V full synthetic 10W-30. Kinda pricey but definatley worth it. It's a full race oil.

 

I like royal purple but, when it hits $8 a quart and Mobil was less than $5; I changed back. Not to mention, you can't just drive into your local Walmart or Costco and get Royal Purple. I have to drive over 50 miles to buy the stuff. Now if RP was a little easier to get .......

 

I use Amsoil in all my vehicles..including my motorcycles.

I have it drop shipped to my work and use K&N filters.

Less than RP and alittle more than Mobil 1 and change at 5k.

 

Actually, there is truth to added hp numbers after switching to fully synthetic lubricants, although I don't believe the 7whp numbers myself either. From what I've read, it is usually about half that much, but it is there.

There was a link floating about these forums last summer. I think it was to an article on an automotive mag's site and that article listed a number of things that can be done to increase hp without replacing/adding parts to a car. Using synthetic oil was one of those, and they too, observed 2-3hp increase during their testing.

As for me, I'll be switching to Mobil1 at my very first oil change.

 

I have long been a fan of Mobil 1, but I am currently about to give my car its 2nd oil change (odometer read 5997 miles).


Now, I would like to start using synthetic, but I have heard from several different shops that once you go synthetic, its not good to switch back. The claim it actually hurts different seals and what not in the engine.

Any truth to this?

 

^^ From what I've read, that is an urban legend. "Q&A" sections of major auto mags often have that same question, and usually, the questioner is told that it isn't so. Besides, your Z's inernals are practically brand new. Go synthetic!