Im really confused theres so meny types,,, my cars a bugeyed sti whats the best oil for it? would it be a 10/50 good price would be nice too after christmas lol

 

If you type in 'oil' types in the search bar it should bring you at least 50 different oil threads,and you will almost certainly find a few good reccommendations. Failing that just pm oilman with the specs of your car.

 

Or just order via his site http://www.opieoils.co.uk/

 

ok sounds like the oilman the way to go,,,im i looking at a 10/50 or a 10/40 or would both be ok????

 

Millers CFS 10w40 fully synth sat in the garage waiting to go in

 

miller xfs fully synthetic mate

 

For a Bugeye, I think the manual states 5W-30 (a 5W-40 is an alternative).

But ultimately it depends on how you use your car that's the greatest factor in choosing the 'correct' weight....

 

whats silkolene pro s 10/50 like hear good things about it....

 

^^ Used in mine as recommended by the Oilman purple colour too which is

TX.

 

A possible candidate for a future Tech Archive sticky perhaps.

https://www.scoobynet.com/general-te...recommend.html

 

i use 10/40 magnatec in my classic to the disgust of most but its done me well and so far,touches wood,no issues in the many miles/several oil changes later.

 

Hi mate, i've used silkolene 10 /50 pro s in my 03 sti for years now,and good deals from opie oils means its not much dearer than ordinary stuff.

 

Millers 10/50 in my '03 STI

 

5w40 fully synthetic in both my MY03 Spec C and MY99 Version 5 STI type R

Tony

 

I've used silkolene pro s 5/40 for the last 6 years in a bugeyed sti. great oil.

Steve

 

Car: STi 5.

I'm a Fuchs Silkolene Pro S 10W-50 user... Or was.

Now it's changed the branding to Fuchs Titan Race Pro S, or somesuch...

 

you would use an oil that gives you ~10-15cst when fully warmed. a sae40 becomes 14cst at 100deg......an sae50 would need to be 110deg to become ~15cst, so only is recommended if your oil temps are around 110 regularly.



What would happen if an oil with too thick a viscosity is used?

Not a lot really, the oil pump will still cope easily with an sae50 or even sae60, the oil will still be delivered to all bearing surfaces albeit at a higher pressure, although high revving engines in theory can force flow greater than the viscosity can cope with causing cavitation which will put air bubbles in the oil making it foamy, and also will quickly shear the oil down. economy will also suffer.

bear in mind that even an sae40 oil is still 30cst at 70deg.

What woud happen if an oil with too thin a viscosity is used?

bearing damage if the viscosity goes too thin i.e. significantly less than 10cst or the engine tolerences are not good enough to provide protective oil pressure.

So the oil you would use is the thinnest oil that gives you ~10-15cst and also decent oil pressure. and also gives you the best coldstart viscosity (oil pressure diminishes as an engine gets older as clearances get larger).

in my case, this would be a 5w40 although a 0w30 would probably be even more suitable.

 

10w50 Millers CFS from Opieoils - V5 99 STI.

 

5w-40 fully synthetic as recommended by oilman

 

thats what I use...very good!

 

Good stuff.

Branding changed to Fuchs Titan Race Pro S 10W-50

 

Silkolene 10w/50 in summer, and Motul 300v chrono 10w/40 in winter.

 

another one hear using the silkoline/fuchs 10w/50.

 

just ordered some silkolene pro s 10/50 from oilman a bargain at £46 with free delivery....