My sti4 TYPE R is in for a service on sat my best mate dave recomends 5w 40w fully synthentic is he right or should i ask him for part sythentic, he said if driven hard listen to me or other wise get advise please help....

 

10W-40 fully synthetic would be better IMHO or even 15-50 during the summer.

 

agree what he said ^

subaru will only put semi oil in on a service

 

Fully synthetic is better quality but is more expensive. It's up to you really but I would say that fully synthetic would be the better option.

Cheers
Simon

 

can anyone tell me what they put in cosworths cause me mate dave works at fords so he said he can get the oil fully synthetic for nowt is this a good option. thank lee.

 

Most manufacturers use what they can get at the best price in bulk at the time. Check the spec and post it on here OILMAN will I'm sure be able to enlighten you. IIRC Ford favoured Duckhams oils......

 

He assures me its 15w 40w and yes it is duckhams, (fully synthetic) apparently they put it in all the cosworths he said it would be fine can anyone explain the number and letter system they use ie 15w 40w what does this mean. cheers for the info

 

The 15w-40 is most likely to be a hydrocracked mineral oil as most oils of that grade are, but I would need proper tech data to be sure.

Its not the ideal grade for your car as it will not provide great cold start protection, 5w-40 would be a better choice.

Cheers

Simon.

 

Can recommend getting oil from Opie Oils based in Redruth, Cornwall. Fuchs Silkolene 5W40 Fully Synthetic in 5 litres available - they will also mail out at small extra cost. I don't work for them etc. but my dealer used the oil I purchased from Opie Oils (Silkolene 5W40). A good supplier to consider and I will be buying again in future if the prices are still competitive - as it's not easy to buy decent oils at fair prices from most retail outlets - website: opieoils.co.uk

 

Thanks for the response guys will consider purchasing the correct stuff not any old crap my mate is giving away youv;e all advanced my knowledge in this field thanks again. cheers all lee.

 

I only ever use chipfat cos its thicker and helps protect my engine more. I think you should all do the same.. these oil companies are just ripping you off with their fancy numbers and letters that mean nothing.

 

are you taking the pi$$ chip fat oil i bet she smokes abit.

 

erm sorry about that,gay celica drivers muckin about when i left it logged on at work!