which synthetic oil do you prefer??

gumpy

You should have put it in the engine area of the forum.

My first change will be at about 4k miles with RP as i've decided to use ester based oils in the car.

Daishi

Royal Purple isnt an ester based oil..

gumpy

I'm reasonably sure it is, it's a Group V oil isn't it?

You got any info which shows it's not? Happy to learn more... The article posted on the RP site suggests that it doesn't but does it indirectly... but all the other wisdom on the internet (and yes i know the net isn't the best for info) suggests it has plenty of esters in it...

I've just shot an email to RP themselves for an answer... Will let you know of their response...

Danny3.7

Guys I swear I lost hp and tq with Royal Purple 5W30 with this engine. and from what I have heard the 350Z HR guys have quoted the same. This stuff works wonders for the old VQ and it is what i ran in my G35C, but not in the Z, never again. It was my first mistake I made with this car. redline FTW!!

gumpy

oh that's a shame... though i probably won't notice it cause i'm changing from the factory fill....

chuckd05

You are saying you lost power just by your butt dyno ? I just did a change with royal purple yesterday and the car feels as strong as ever..

anyone else feel the way danny does ?

__________________
09 370Z 6M PW - FBO Best 1/4 mile = 12.926 @ 109 SOLD -- 08 BMW 135i - FBO 12.1@120mph SOLD -- white 09 e92 335 Coupe Mtech - 11.9 @ 119 :-)

Danny3.7

Yea that is what i'm saying, good ol butt dyno. That just goes for me personally, and i did not do any searching for what people were using before i switched to RP. I just assumed what worked for the vq35de would work for the vq37hr. Then i was told by a 350z guru (westpak@HPLogic) that guys who had reported switching to RP in the vq35hr were stating the same feeling of declined performance. I still continue to use RP motor and gear oil in my other Nissan though.