and btw i run royal purple 5w30 on my g and it LOVES IT. added atleast 5hp over the conventional oil that was in it before. revs, and runs alot smoother.

 

Not sure about ripping me off, since he is a family friend. We don't have dealerships here for Skylines (G35 or earlier versions), which creates a hassle to find any information on the cars. However, I agree that synthetic oil is fine with all the replies. Haven't heard of a car that wasn't. I'm sure just cos the engine is tuned to running 100 octane and is only running 98 will not make it work worse on synthetic. Apart from that, don't see a difference with the US spec G35 engine. Synthetic oil here I come.

 

have you sent an sample of it in? the analysis on my350z show RP 5w-30 to be one of the worst performing oils to date. im also not sure how you can feel 5hp especially if you take any drivetrain loss out of that. if you are suggesting that is rwhp then it would surely show on a dyno.

 

Not true. Sythetic is the best oil. Just use it after the care breaks in good. The only time you should not change to sythetic is if you car never used it and you have allot of miles on the car.

 

no, i havent sent in any samples, why would i do that unless im spinning bearings every oil change?. you say its one of the worst performing oils to date what made you come to that conclusion? and im sure that if i had dyno'd my car before and after the oil change a 5hp increase would have been shown. it could just be going from broken down degraded oil to fresh new oil, or royal purple really does what it says and lubricates better thus reducing friction and increasing available hp. and thats where my money is.

 

the analysis on my 350z shows it to be facts from the samples of RP 5w-30 that have been sent it. "Royal Purple 5W-30- This is the worst performing oil to date, with high wear numbers and high shear" This is quoted from the 1st page. He also states that this was 1 sample but some other members have received Blackstone analysis back with almost dead on corresponding results. I am not a hater of Royal Purple, just want to get the best my money can get me. I was actually planning to go with RP but after seeing the factual results, I have picked up M1 5w-40.

 

My God, this topic has been beaten to a pulp! Everyone is an expert. Unless you have a real bad experience with Synthetic oil and can prove it caused problems to ur engine, ur opinions are just opinions. I for one was suggested to use Synthetic oil on my first oil change at the dealer. I currently have 42k miles and have no engine problems.

 

Some info (more than you will want ):

http://www.carbibles.com/engineoil_bible.html

http://www.bobistheoilguy.com/

http://www.performancemotoroil.com/Dyno_test.html This seems to be the ONLY indipendent test I could find.

 

Independent? It says right at the bottom of the page that the website is an authorized Amsoil dealer. I, myself, have never heard of the publication that supposedely did the test, but I wouldn't consider that site anywhere near independent.

 

The website is an authorized amsoil dealer, but the article was taken from an independant magazine publication, its like motordyne quoting the results from the Nissan Sport Magazine's spacer shootout.

 

I realize that, but the publication was one that I've never heard of, which makes it invalid to me. If others have heard of it, great, but to me, it might as well be some guy off the street making it all up.

Small publications can be bought off very cheaply!

 

I have driven my car the exact same and got synthetic at 3k. You are fine.

 

I have to admit that I had never heard of it either. But I had never heard of Sport Z or Import Tuner, or Turbo until I owned a G.

In any case, if you use a good name brand oil and change it reguarly, you have nothing to worry about.

The only reason I would never use a "race" oil is that racers change it EVERY race. I'll bet it never gets more than 500 miles on it.

 

Smart move.


Steve
Hi-Tech Oil Co, distributing industry leading AMSOIL synthetic motor oils for 20years.

 

An extremely thin oil would show a horsepower increase, but that doesn't mean it's going to help prevent wear and tear better than another oil could. Indeed, 0W-5 oils are used in race engines because of the power increase they offer, but no one in their right mind would use that on the street.

A common characteristic of any brand synthetic oil is that it will increase power, so for a synthetic oil to be marketed on the promise that it will increase power is like saying, "Our tires are round and roll, so buy our tires!" Give me a break.

Steve
Hi-Tech Oil Co
Distributing industry leading AMSOIL synthetic motor oils for 20 years.