Hiya. Whats everyones opinion on the best engine oil to use in a standard/stg1 cossie engine? what weight, make, etc?


Cheers guys,
Mike

 

cue the opening of a can of worms!!! lol

to be honest m8 there are lots of opinions as to what is best but you won't go to far wrong with mobil 1 motorsport, valvoline synpower and castrol rs 10/50

steve

 

OMG Worms everywhere.

I give it 10 minutes.

Oilman?

 

i jsut used some of that mobile 1 rally formula 5w50

 

I have found in the past that the engine when cold is more mechanical sounding with 15w50 mobil 1 motorsport than the thinner oils around, but is much much smoother once warm.

 

Y2K RS, would that not indicate that it aint doing the engine much good when cold?????

 

thas why i used 5w50 not 15w50

 

hmmmmm, hope i aint started anything too bad, lol. Same issue when i was asking about my r5 turbo on another site.

Mike

 

agree with the logic, most people highly recommend the 15w50 motorsport for high hp road cars and race/ rally cars but these will always be brought up to temp before serious abuse

Hard to admit, but all my cosworths in the past 14 years ran on normal good quality mineral oil with regular 5k changes and felt much smoother than when it was swapped for the so called better synthetic oils - these were all standard 2wd cars though.

I used bog standard mineral oil to run in my latest car for the first 2000 miles then swapped to 15w50 mobil 1 motorport and it was quieter when cold on the normal stuff, but within a few mins of use its smoother on the mobil 1.

so I guess its just a case of letting them get up to temp for a few mins before using the loud pedal if you use the thicker synthetics

Also makes a difference if 2wd or 4x4, as the 2wd engine does not have the offset gudgeon pins so are all slappy when cold and the 4x4 with its improved ecu/lambda and knock sensor probably helps to mask the cold running noises to some degree until up to temp.

You also have the problem with the thinner synthetics of noisy tappets and more oil leaks and more oil usage due to the fairly slack tolerances of the cosworth engine as opposed to the modern motors about

 

--

 

castrol rs 10/60 what i use

 

i use the valvoline 5/50
works for me,but then mine has a complete 4wd engine

 

castrol RS10/60. what i use

 

Didnt later 2wd engines have offset gudgeon pins before the 4wd engine came along?. I found old road test of 1990 4x4 saph, and ford recommended synthetic oil only for this engine, so must hav used mineral in the 2wd engines.

 

Silkolene Pro S 10w-50 was recomended by Oilman to me.

price is pretty good too for 25 liters.

 

Oilman recommends:

10w-50 as being a good viscosity for cossie engines and 15w-50 as an option but not so good for cold start protection in winter.

As I've stated before, sae 60 is really too thick.

Have a look at tech data here: http://www.opieoils.co.uk/lubricants.htm

Where's the oil thread?

Simon

Oh no not another oil thread

 

i use castrol rs 10w/60 - is that any good?

 

i use the same golden stuff

 

If you're asking whether it's a true synthetic or a hydrocracked oil then the answer is it's a hydrocracked.

Does it protect better than a true synthetic - No.

Just make sure you change it regularly would be my advice as it will not stay in grade for too long. (It will be a 10w-40 within a couple of thousand miles)

Cheers
Simon

 

site wrecker

im on castrol 10w60

 

hmmmm, 10-60 seems to be the one. i ran it in my mk1 escort, and it did the trick then.

Cheers
Mike

 

It's personal choice really but I think it's too thick really.

Cheers
Simon

 

you got a website oilman?? with prices on?

now I got a big wing sump it costs twice as much to do a change

 

Yes. http://www.opieoils.co.uk/lubricants.htm

For prices, just drop me an email sales@opieoils,co.uk

Cheers
Simon

 

dont worry ya not alone there