The reasons synthetic oils are better

[ro284]

Could i ask again about thoughts on a synthetic Premix please,
Thanks Bob

[kev-yorks]

I\'ve been using Total Quartz 9000 for a while now and would be intrested to see how this stacks up. Its only a lube oil though as i\'m running millers KB2T(castor/synthetic blend) as a premix.
 Thanks for the great thread as you finally seem to have people wondering if they should stick with minerals or embracing the newer oils.
Regards Kevin

[oilman]

Could i ask again about thoughts on a synthetic Premix please,
Thanks Bob

I think I replied to you by email but in essence you could use a decent synthetic bike premix however I would recommend that you just use a decent synthetic oil in the first place and drop the expense of a synthetic premix.

Cheers
Simon

[oilman]

I\'ve been using Total Quartz 9000 for a while now and would be intrested to see how this stacks up. Its only a lube oil though as i\'m running millers KB2T(castor/synthetic blend) as a premix.
 Thanks for the great thread as you finally seem to have people wondering if they should stick with minerals or embracing the newer oils.
Regards Kevin

I used to sell this stuff, it\'s in fact of the hydrocracked (mineral modified) variety. If you\'re looking for something that\'s top drawer, there is much better out there TBH. Still better than GTX though!

Cheers
Simon

[Adriansturgess]

Simple question (I hope).....If you swap from mineral to a fully synthetic oil is it enough to just drain out the mineral and then fill up with the synthetic as obviously you will get a certain amount of contamination from the mineral oil that remains in the engine. Any advice?

[oilman]

Yep just drain and refill, the new synthetic will clean out all the old mineral over the follwing service period.

Cheers

Simon.

[dre]

It\'s a very interesting read, but i\'m still not 100% convinced about using a synthetic oil in my rotary. Just a couple of questions Simon.

1. The standard oil control rings deterioate with synthetic oils meaning these will leak unless you change them when rebuilding your engine.
2. The oil deposits that build up in the chambers from the oil metering jets. My understanding is that synthetics will not always burn and leave oil deposits.

It\'d be good if someone had the time to test out what happens to a tuned rotary when running synthetic oils. i.e. run it for 6 months then take it apart and see what\'s happening to the internals.

I wanna use a better oil but i\'m worried about the above side affects. The plus sides of synthetics would be the shear stability which is needed as our engines run extremly hot and all of our expensive single turbo\'s will end up destroyed. Plus the wear on the engine bearings!!

I am currently using Castrol GTX 10w 40 (don\'t laugh) but after reading this thread will probably be doing an oil change every 1000 miles!!!

HELP!!! What oil can i use that is better than my current oil but not a fully synthetic, or am i worried about nothing??!!

[oilman]

TBH you are worried about nothing. If you want to consult someone who has used decent synthetics like Silkolene Pro S in their rotary, talk to the likes of Ross Juniper at Dragon.

As I have said before, on a non-stock car you\'re mad if you don\'t!

Cheers
Simon

[Trevrx]

Simon, My oil injection is disabled, so I premix at 100/1 using Shell synthentic premix oil.

Would you say there is still a need/advantage to using fully synth engine oil, as I\'m using Castrol 10/40 at the mo, which I feel uncomfortable with!

[oilman]

In short yes, use synthetic if the car is not stock!

Cheers
Simon

[butcherboy]

Simon, My oil injection is disabled, so I premix at 100/1 using Shell synthentic premix oil.

Would you say there is still a need/advantage to using fully synth engine oil, as I\'m using Castrol 10/40 at the mo, which I feel uncomfortable with!

I am in the same position...I too have my OMP blocked off and hence run premix at a similar ratio using \'Shell Advanced Racing M\'...a castor/synthetic blend 2/4 stroke oil.

Im all for using fully synthetic in my engine as it is moderately modded and i believe that it would benefit greatly from synthetic oil, however the ONLY thing holding me back is the effect synthetic oil is suposed to have on the Oil seals...i have just had a fresh rebuilt with all Mazda OEM oil seals etc...and im not wanting to sabotage them by using synthetic oil...if that is indeed the case???

If i can be convinced that this is purely a myth, and the use of synthetic oil will not reduce or harm my oil seals then i\'d change to synthetic in a second...However all this talk has got to have sum sort of substantial origin doesnt it?

[oilman]

Modern synthetics do not eat seals, this is history and has been for 20 odd years.

Believe me or not, it\'s a fact that it will not happen.

Cheers
Simon

[butcherboy]

Thats it, im sold then...will change to full synthetic in the next 500kms or so.

Great initial post, i dont get on here often, but im glad i stumbled on this today..

cheers.

[88GT-R]

I am in the same position...I too have my OMP blocked off and hence run premix at a similar ratio using \'Shell Advanced Racing M\'...a castor/synthetic blend 2/4 stroke oil.

Im all for using fully synthetic in my engine as it is moderately modded and i believe that it would benefit greatly from synthetic oil, however the ONLY thing holding me back is the effect synthetic oil is suposed to have on the Oil seals...i have just had a fresh rebuilt with all Mazda OEM oil seals etc...and im not wanting to sabotage them by using synthetic oil...if that is indeed the case???

If i can be convinced that this is purely a myth, and the use of synthetic oil will not reduce or harm my oil seals then i\'d change to synthetic in a second...However all this talk has got to have sum sort of substantial origin doesnt it?

Only use an Ester based fully synthetic, as Simon has eluded to in this thread....

J

[butcherboy]

duly noted.

Just whilst i have ur attention, what is ur take on Castrol Magnatec in a Premixed rotary??? it is a semi synthetic which has an ester based additive....any good or stay away???