Penrite Oil

[JBT]

Go to the Penrite home page and follow the links to see what they recommend for your model.

[Russellb]

I use Sin 10 in the Sp Replica race car
It work a treat and I change it every event or if oil temps go over 120DEG C

[Hellmun]

I used Sin10 in my NB8B that saw 8000 race kilometers. It never consumed any of it.... that oil doesn't break down easy at all. On the other hand my car is consuming the Royal purple 10W50 I'm using at the moment. 3000k's and it got low on the dipstick. I think the car idles slightly higher on the Royal purple though. The penrite seems to be excellent bang for buck. Just taps for a few seconds longer on start-up than the Royal Purple does. Only costs half as much however.

[JBT]

any 2nd choice preference after Penrite?

Castrol.

[Leonw]

This is a topic that interests me.

After some research I decided to use Penrite Full Synthetic SW-40 in my NB8A MX engine.

The next step is replacing the gearbox and diff oil and so far have not decided on what is the best product. (plus not getting around to it)

So any advice on this thread on oils is welcome.

Leon

[Hellmun]

May I warn that on the NB8B 6 speed I used penrite SIN 75 gearbox oil and it felt like the car lost the syncho on 3rd gear. I dropped it out after just 800km's and put in some Redline (MT90 IIRC) and it made a massive difference to the 6 speed box.

[stevesports]

i'm gonna chuck in redline lightweight shockproof

check out this site

http://www.performancelub.com/

the guy is selling them for $21 per quart.

forgot to add, i drive a NB8B

[Hellmun]

Greyhair I believe it's more a product of the 6 speed box being less than brilliant rather than the penrite oil being bad. It's incredibly finicky. For a non race example with the penrite I would have to wait a minute or two of driving before I could shift into 2nd without a crunch or absolutely perfect rev matching. With the redline I can shift into 2nd immediately after taking off from cold. I thikn the redline is just a stickier, slippier oil and you will pay for that. Cost me $110 for the 3.75 litre bottle. The penrite was about $75 for 4.0 litres. IIRC.

If you read through the forum I think you'll find this isnt' an isolated of me having a dodgy gearbox. Many people noticed the difference the redline made.

[fattima]

i'm gonna chuck in redline lightweight shockproof

check out this site

http://www.performancelub.com/

the guy is selling them for $21 per quart.

forgot to add, i drive a NB8B

I would tend to use MTL or MT-90 for a road car
Redline state that ShockProof is not recommended for must syncro boxes
http://www.redlineoil.com/products_gear ... tegoryID=6
It is more a race oil aimed at dog boxes. I have heard of some people having issues with it in a syncro box (not an MX5 by the way).

Can confirm http://www.performancelub.com/ are good to deal with.
Would anyone be interested in a group by of Redline? I work around the corner from the guy who runs performancelub so would be easy to organise. If there is interest I'll chase it up.

[Mactype]

Would anyone be interested in a group by of Redline? I work around the corner from the guy who runs performancelub so would be easy to organise. If there is interest I'll chase it up.

Yes please

[ducktape69]

for bang for buck engine oil...i have found the castrol fully synthetic stuff is as good as any...around $45 or so for fuly synthetic...
ive tried basically all oil types in many cars...castrol gets my vote for bang for buck...

ive got the castrol fully synthetic 5/30 at the moment in my NB8B for about 7.5k km now...performs superbly...i was using penrite for a long time and also great stuff...

stay away from the valvoline ranges...all nasty stuff IMO

[bigdog]

i'm gonna chuck in redline lightweight shockproof

check out this site

http://www.performancelub.com/

the guy is selling them for $21 per quart.

forgot to add, i drive a NB8B

I would tend to use MTL or MT-90 for a road car
Redline state that ShockProof is not recommended for must syncro boxes
http://www.redlineoil.com/products_gear ... tegoryID=6
It is more a race oil aimed at dog boxes. I have heard of some people having issues with it in a syncro box (not an MX5 by the way).

Can confirm http://www.performancelub.com/ are good to deal with.
Would anyone be interested in a group by of Redline? I work around the corner from the guy who runs performancelub so would be easy to organise. If there is interest I'll chase it up.

This has been discussed many times before. Lightweight Shockproof is the Redline Australia recommended oil for 5 and 6 speed MX-5 gearboxes. Mine has been running on it very happily for over 50000km and the shift is much sweeter than it used to be with Castrol and Motul gear oils.

[fattima]

Lightweight Shockproof is the Redline Australia recommended oil for 5 and 6 speed MX-5 gearboxes.

Cheers bigdog didn't know that

[manga_blue]

This has been discussed many times before. Lightweight Shockproof is the Redline Australia recommended oil for 5 and 6 speed MX-5 gearboxes. Mine has been running on it very happily for over 50000km and the shift is much sweeter than it used to be with Castrol and Motul gear oils.

That's no reason why we can't keep discussing it though.

I wrote to Redline USA about it a few weeks ago because of problems with baulking and poor synchro performance with another brand. Here's the response:

Phil,

Thank you for contacting Red Line Oil, in your Miata transmission I would recommend the MT-90. Do you know what fluid is currently installed? It may be too slippery for the synchros.

Regards, Dave
Red Line Oil

[stevesports]

Why do redline australia and redline redline contradict themselves?

On the topic of redline, do people think that using the heavyweight shockproof oil the 1.6 diff could withstand more power?

might be due to the difference in weather conditions. I guess the large variations in temperature, including cold winter times require an oil like MT-90, whereas Aus is much warmer therefore lightweight shockproof is more approriate. This is my guess anyway.