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Engine/gearbox/diff Oils

BookyVL
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Fitzpatrick Speed Works Mentor

Fitzpatrick Speed Works

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Posted

We have been doing heaps of tests on oils recently, as we have set up a test using a head in a jig tied into a lathe. The head is then spun at 6000rpm with a syrenge set up on a timer to periodically drop 20ml of oil on the the cam lobes with the test performed for 20mins on each oil. The cam and all related valvetrain is then swapped for another set of new gear so we can gauge exactly what each oil is doing. The tests we are doing are a little crude as compared to full laboritory testing but funnily enough castrol has been sending us samples of new oils they are releasing, initially i think to see if we knew what we were doing but now as a secondary source of info.

The problem is each year oil companys are under stricter and stricter regualations on emissions which means they are removing good minerals and chemicals that prelong engine life and stop engine wear.

It has been very interesting to see what some of the oils have done under the testing. Synthetics are generally half as good as even the cheapest mineral oil, but alot of cars must run synthetic for the weight properties. I dont want to bad mouth any oils and I wont but from our tests, if you want a good synthetic oil for your car run a motor bike oil like motul or repsoil. The oil for motorbikes doesnt need to meet emissions testing and it it designed better as in a bike it has to be under more loads as the gearbox uses the same oil. About the closest to these in terms of performance in our testing would be redline synthetic, and motul 300. There are few good other ones but these few I have mentioned are easily available to most of you guys.

Hope this helps

Fitzpatrick Speed Works Mentor

Fitzpatrick Speed Works

Posted
Posted

Castrol was quite good with there mineral 20-50w oil being one of the very best commercial oils and its a good price. There synthetics were better than alot of the others but still not what you would want for the price you pay, alot better than the other major three if you can read between the lines.

For a more standard engine ie, standard lift, duration, valve spring rates its is sufficient!! PM If you want some direct comparisons!!

Cheers.

Nugget_GTR Collaborator

Nugget_GTR

Posted
Posted
Gearbox redline light weight shock proof

diff redline mt90

gtr tranfers DONT USE REDLINE you most use the matic d nissan oil if you want it to last (this came from a head more knowledgable than myself who had rebuilt a shit load of transfers)

engine mobile 1 is good so is the redline products

I use redline light wieght shock proof in the transfer too... its great no complaints so far :D

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