which synthetic oil do you prefer??

Spec Jay

Redline 5w-30 with Genuine Nissan
Redline Trans
Redline Diff

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pty370z

I wonder if the Red Line 10W40 would've performed better than the one tested...

Impressive results for Royal Purple 10W40...

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j.arnaldo

...an eye opener...And to think that I gotta use up 4 more cases of Mobil 1 I bought last summer on sale! So, from now on it's R.P. or ester-based oils for my '04 Z!!! On the bright side, I'm 61, and NEVER push my baby too much, so I can keep 'er forever!

gumpy

guys becareful about putting too much reliance on this test, from what i understand it only tests a very narrow spectrum of what an oil is suppose to do. I'm a RP user myself but may change, the UOA's show that RP's aren't always the best with our engines...

LiquidZ

I agree with Gumpy.

The Timken test is not the end all be all of oil testing. This test is primarily run to determine the performance of extreme pressure additives found in an oil. Here is the ASTM link for the test: ASTM D2782 -02(2008) Standard Test Method for Measurement of Extreme-Pressure Properties of...

An oil is subject to so much more than what this test can prove. UOA's are one of the greatest, if not the greatest ways to verify the performance of an oil in your engine.

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gumpy

Actually i heard UOA's are limited as well as they only show dissolved metals and not the non-dissolved stuff...

Food for thought people, i asked my taxi driver how often they change the oil. They do it every 10k km with some cheap *** gulf western oil... their engines last over 800,000km... hmmm...

6SPD_FTW

Never heard that before. The UOA's all measure the percentage of insoluble material (which is a measure of oil filtration). Otherwise, UOA's are the best way to determine how YOUR ENGINE is getting along with the oil you put in it.

My previous car was a 2007 Altima 3.5SE VQ35DE. I abused the crap out of that car and had it for 40,000 miles before trading. I have documented UOA's for nearly every oil change I performed on that car using Castrol Syntec 0W-30 (aka, German Castrol, aka, G.C.).

That is the ONLY oil I've used since the UOA's for the Altima were as perfect as you could ask for. Now the UOA's on the Z (of which there are only 2 so far) are still trending down on the wear metals, but look absolutely perfect considering miles and driving conditions.

The 0W-30 flows like a 0W oil at 32ºF. And basically, that's the only time you really care about the 0W. The only reason I use 0W is because the 0W-30 is a German engineered and produced oil. All other viscosities of Castrol Syntec are designed differently and aren't any better than Mobil1. The G.C. actually holds its viscosity better than nearly any other 30W oil at high temps, so that's all I have ever used and all I ever will use. Plus, it's not terribly expensive ($6.50/qt) and is accessible (available at all Autozones).

Late,
Trav

antbear

Dyno Tests For RP....................

Royal Purple Independent Videos

mrcardio

The way I see it all synthetics are the same.

LiquidZ

If that were the case, then there wouldn't be 5 classifications of oils (group numbers).

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Volcom370Z

Not sure how independent the tests are when they are on Royal Purple's website...

hence all the discussion regarding oil


Having done my own research into Redline (and Motul for that matter) and their track record, I think that their oil is the best for the Z (ester additives along with being full synthetic). There are so many smoke and mirrors from each company, you almost need to find reasons NOT to buy them just to finally get to a decision. I get multiple conflicting things from all the different oils, but Redline seems to be the most straight forward IMO. They have been around for quite a while, they have more involvement in racing applications (from what I can tell), they are upfront about their base stocks, and people are having great success with them in this forum. I don't like the way Amsoil seems to sell their product, and the information out there regarding Royal Purple seems to be hit or miss (not to mention Mobil 1 and all those... I hate the company wars and will cause me to buy neither product i.e.- Mobil 1 vs Amsoil, AT&t vs Verizon). The link I posted does seem interesting for Royal Purple, but I think I've finally decided Redline is what will give me the protection and piece of mind I want for my Z.

Nick911sc

I think I'm the only one on the forum with Agip full synthetic in my Z.

SE

I'm going to be switching over to Motul 300V 5W30 once I hit my first oil change. They use an Ester formula rather than an Ester base like most other synthetics. There's an interest

I had some old stock that I sold off thinking I was going to use Redline.

DRoc7822

The only synethic oil that Ive ever used was Mobil 1 5W30.... and in other cars Ive always used a Fram Oil Filter (Which I will prolly get crap for). But in my current car (Which only uses a cartridge and not a filter) I just use the OEM Mazda cartridge since I have a Mazdaspeed 3 currently.

gumpy

I thought it was the other way round... motul is group 5 and uses ester base stocks and the others are group 4 with esters added...

Never-the-less i think i'm going motul next... I'm not gettin the warm and fuzzing feeling from RP after looking at all the UOA's on BITOG forums...