TIZERBOY

iTrader: (1)

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

midnight

iTrader: (10)

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.

Glowplug

iTrader: (8)

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

TIZERBOY

iTrader: (1)

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????

JonMc

iTrader: (51)

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

willsy369

miller xfs fully synthetic mate

joz8968

iTrader: (13)

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....

TIZERBOY

iTrader: (1)

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

Terminator X

iTrader: (7)

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

TX.

Glowplug

iTrader: (8)

A possible candidate for a future Tech Archive sticky perhaps.

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

The Rig

iTrader: (13)

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.

handsome rob

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.

Moley

iTrader: (9)

Millers 10/50 in my '03 STI

TonyBurns

iTrader: (3)

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

Tony

steve sti-7

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

Steve

joz8968

iTrader: (13)

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...

gallois

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.

Reef

iTrader: (2)

10w50 Millers CFS from Opieoils - V5 99 STI.

MarkC

iTrader: (12)

5w-40 fully synthetic as recommended by oilman

Hongkongfooi

iTrader: (8)

thats what I use...very good!

joz8968

iTrader: (13)

Good stuff.

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

bobby chang

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

bigarf

iTrader: (67)

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

TIZERBOY

iTrader: (1)

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