Oils, a technical explanation!

[ayrton012]

I have an RX-8 Revolution. There are two oil ring seals on every sides of the rotors. Inside these seals are O-rings. Do you know that are these O-rings made of rubber or cast iron? I\'m courius because if these are made of cast iron, than the "true synth-synth-mineral oil" question is answered: No matter. But if these are made of rubber, than I don\'t know.

I can buy Mobil oils cheaply and those are greats so I use Mobil-1. My "problem" is that here are only 0w-30 or 0w-40, (isn\'t 5w Mobil-1 oil which is close to the 30 grade), so these are true synthetic. Now I use 0w-30, but I don\'t know it\'s affect on these O-rings, if thats are rubber.
I know there is Mobil Synth-S 5w-40, but I think Mobil-1 is better.

[oilman]

I was informed by Mazda Uk some time ago that there are no seal compatability issues with the renesis engine. However they have not tested the engine on synthetics.

I use synthetics in my RX8 and have done for a while now with no issues, only benefits!

Cheers
Simon

[kev-yorks]

Simon been using Total quartz 9000 for a while now i know its full synthetic but not sure on the blend if its okay for the seals? Any info would be appreciated. Also can you supply premix oil in bulk ie gallon containers
Kevin

[oilman]

Kevin,

I can\'t see any problems with this as it\'s predominantly a Group III petroleum hydrocracked oil as opposed to a pao.

I have premix in the Silkolene Bike oils range listed on my website.

Regards
Simon

[mpk490p]

I ended up using Valvoline Turbo V 10W30 with a Blueprint filter I got in a local parts place.
Seems to run just fine and has hardly gone down at all after 450+ miles.

I\'m sure 10W40 would be OK too though especially with higher mileage.
Its the regular changes that are important I think.

Z

OILMAN,
i can get Valvoline Turbo V 10w30 as my missus works for cummings, Valvoline recoemended the Synpower 10w30 and there DuraBlend FE 5W30, any recormendations on these 3?

thanks
Mark

[oilman]

The 5w-30 will probably the better of the two as a semi synthetic, the 10w-30\'s are usually more basic. If the engine is modded though we would suggest the thicker 5w-40/10w-40.

Cheers

Simon.

[mpk490p]

top man thanks for the quick reply
:Thumbs-up
Mark

[stylus350]

Hi oilman.

I have a large streetported Rx7 running a TA45 and 1.1 bar boost.It is a daily driver. I currently use Silkolene Pro S 5 - 40 which I purchase from you. Is this ok, or is there something else you would recommend? Also - how often to change oil and filter?

[oilman]

Perfect choice.

We have been running this in the Dragon car all season with superb results.

Cheers
Simon

[stylus350]

Perfect choice.

We have been running this in the Dragon car all season with superb results.

Cheers
Simon

Thanks. I am thinking of making the oil changes every 3000 road miles. Does this sound ok? Also, on track days in my cossie I used to change the oil before I went and again afterwards. Does this sound like overkill? I dont mind the expense so much if I am looking after my engine but dont want to do it pointlesly.

[nicksterrx7]

Perhaps what would be handy is a list of possible oils that we can use.

I\'ve always used Shell Helix, purely because this is what I was advised to use by Rotechnics years ago.  My car has been on this for 8 years without any obvious ill effects.

[strange_days_uk]

Simon, I bought oil from you before on the Fiat Coupe forum, and am inclined to do so again.

Mine is a single tubbed FD running around the 350 rwhp mark

I am inclined towards a semi synth after reading your research

What would you suggest ?

[oilman]

Petroleum based synthetic would be a better quality/protection option.

Cheers
Simon

[mpk490p]

im looking to start using a premix 2 stroke as before i still get a good discount on Valvoline products which one would you recormend to use for this?
i imagine the Valvoline 2-Cycle Motorcycle Injector Oil would be the natural choice
http://www.valvoline.com/pages/products/category.asp?cid=1

many thanks
Mark

[mpk490p]

i now have a FD 330ish bhp on twins would the Valvoline turbo mineral still be ok? what viscosity should i go for?