Mixing Engine Oils

[imported_Strider81]

Half way up the M1 my oil light went on (my fault should have checked b4 i left) so i stopped at the nearest and most dearest service station only to find they had one type of oil.

rather than risk it i poured a little of this Castrol GTX Magnatec in to keep the ess happy- however I know this is not the optimum oil and so will it be harmfull in anyway to top it up fully with the recomended 503.01 spec?

thanks

 

I am no expert in oil and i am sure someone is but i very much doubt you will have caused any problem by putting some GTX in. More problems would have arisen had you not put anything in!

 

[imported_gek]

Up to 1/2 a litre of a substitute oil is ok in emergencies I think.

 

[imported_monkeytrousers]

Yep, gek is spot on. I had the same thing happen on the M6 and I phoned Audi Roadside Assistance who said up to half a litre of any synthetic oil was OK in emergencies.

Not sure what the code is for the proper stuff, but I know Mobil 1 is it!

 

[imported_Strider81]

nice one guys

 

[WilkoS5]

I have done this the other way around. I have SLX in the engine and have topped up with Mobil1 as you say they are both 503 01.

I think that it's OK?

 

[CJ A4]

I hope its ok i too had mobil1 and Halfords never had any ...so had to go with the SLX longlife II seems to be ok though.

 

[PaulJC84]

Yeah i should be fine its normally only a problem if you mix semi synthetic and fully synthetic.

 

[AsifG]

thanks for the responses - i'll top up tonight!

 

[dpeilow]

[ QUOTE ]
I hope its ok i too had mobil1 and Halfords never had any ...so had to go with the SLX longlife II seems to be ok though.

[/ QUOTE ]

Don't think you should be using SLX longlife II in the S3...

 

[neil.c]

Any oil is better than no oil, if the light comes on then you are not that far away from engine faliure, best to keep the levels topped up.

 

[dummi]

as soupie says don't mix semi with full synthetic, you will get away with it

 

[imported_oilman]

VW 503.01 is the code.

SLX carries this not SLX II.

Others are Mobil1 0w-40, Castrol RS 0w-40, Fuchs Titan Supersyn SL 0w-30 and Motul 8100 0w-40.

Cheers
Simon

 

[god_thats_quick]

Hi Simon,

Guessing your the same company that posts on Pistonheads - great advise by the way!

How much is the Motul 8100 0w-40 in say 5Litre quantities?

Cheers,

Ben.