Basically as title, its not a fresh engine, its probably done about 30k from being built and those are all hard miles.

Would you always use a fully synthetic oil regardless of mileage ? if so which one ?

I've always got on with Shell Helix semi synthetic in my own engines (non YB) I see Halfrauds are doing Mobil One cheap at the moment too !

Thoughts and suggestions please

 

I just use a semi 10/40

Steve

 

i use mobil 1 motorsport 15w/50

 

only ever used Silkolene to be honest.

 

Got some 300V motul for the new engine im building, current one just gets any old 10/40 - 15/50 semi or fully synth depending on what is lieing about.

On a YB I cared about, I would recomed either the motul or if you want to save a few quid then silkolene.

 

I use 10/60

 

Mobil 1 Motorsport 15/50

Is recommended by several of the Cosworth tuning companies such as Collins/GGR etc. So good enough for me.

 

I use mobil 1 motorsport on mine

 

Mobi 1 for me, 15W50, only cos I've run out of SUNOCO Racing oil
tabetha

 

Silkolene pro s

 

Castrol 10/60 Extra Virgine, will give the Mobil 15/50 a try once ive changed the oilpump (it was quite a bit lower than the Castrol)

 

mobil 1 15-50

 

Mobile one 15/50 for mine recommended by norris motorsport

 

I use Motul 300V 15W-50

 

Even the cans are sexy too if you get the 2 litre metal ones, lol

 

mobil 1 15/50 too, its sitting in the garage still thou awaiting me to finish the engine

 

I tried Millers 10-50w last time round and the engine seems to like it

 

mobil 1 15/50 here aswell

 

The red stuff - Silkolene PRO S 10w 50 - change every 2.5/3k

Used to use semi synth Castrol RS10W 60 previously

 

shit i think ave seen a ghost!!!!!

 

thats what i used to use in mine as well, most people i spoke to recommended it

 

yep the silkolene for me

 

i used silkloene pro s 10/50 in mine

heard good things about millers too, but have had no experience of it

 

silkolene pro s 10/50 in mine. Seems good.

 

pro s is the daddy

 

 

+1

 

Right so Silkolene seems to be coming out on top of the most used Oil.

Who's best to get it from ? Opie Oils ?

 

Always get mine from Opie mate

 

Pro s in mine

 

Opie sell it, and for a couple of quid a litre more, they also sell the Motul 300V

 

why do you change it so frequently?

 

Surely there is no need to change it so often?

 

There is every need to change it at 3k, im probably the only one on here that has his oil chemically checked after a Topspeed run. Castrol RS was out of Spec after just one run down Brunters & had 8% fuel blowpass. I use Silkolene 5/40 which has proved to be the best for my application, showing less than 2% fuel blowpass & maintaining its Spec after repeated runs.

 

always used mobil 1 15/50...........get it from matt lewis at a very good price

 

Second that. Matt does it at a good price

 

Fair enough for track use and top speed runs. I dunno if mike 1 does that or not. Should have asked.

For normal road use tho it shouldnt need changed that often surely?

 

but most people dont go 200 mph.............has any tests been done on "normal" fast road cars.....??????

 

Why do people go for such thick oil like 15/50 - that must be very hard for the engine on coldstarts...I understand the 50 - but seems very thick oil when cold? I use Mobil 1 5/50 and change every 3K - works great

 

People writing on this subject say 'my engine likes or dislikes a certain oil' how do you know what your engine likes.