What oil?

[ollyhock]

Just about to service the car at the weekend

What's generally regarded as the best oil and grade for the gtt

Many thanks

[bye_all_c_ya]

ive always used 10-40 myself and most brands :)

[haizyr5gtt]

i spoke 2 a mechanic at our local car accesory place (fast parts) he looked in a book and said 15/40 comma xt2000 semi synthetic is best suited.

[The new Bill J]

Just use the cheapest semi-synth you can find.

[tobester]

I use 5w40 fully synthetic Carlube Triple R and a bottle of greased lightning teflon treatment every oil change. Changed every 3000 miles.

[jure]

I use controversial Castrol RS Formula 10w60. Will try 5w50 due to my new turbo (GT series).

[Alex]

Halfords own 10-40 semi synthetic (in the green tub) :)

[Jono]

I use controversial Castrol RS Formula 10w60. Will try 5w50 due to my new turbo (GT series).

Thats the same oil my M3 uses...£16 per litre, its like treacle!

[jure]

For M3s and M5s Castrol TWS 10w60 is "prescribed" for keeping double Vanos in good shape. Do not know difference between RS and TWS only that second one is almost double in price.

[phase i 16 v turbo]

Shell Helix Semi Syntectic 10 - 40 in my Renault 5 GT Turbos
Duckhams Hypergrade Semi Syntectic 10 - 40 in my RS Turbos
Castrol Edge Sport 10w - 60 in my RS Cosworths
They all have different characteristics. I have tried mixing them round but that combination keeps the engines quite and well maintained.

[bye_all_c_ya]

Halfords own 10-40 semi synthetic (in the green tub) :)
i must say i found this better then most ive used ?

[ollyhock]

thanks for the replys, i might consider changing my oil every 3k aswell so ill probably get away with the cheaper semi synthetic halfords as you say.

anyway thanks for the advice:)

[Brigsy]

I use the cheapo comma semi synthetic 10/40. Its not so much the oil that's important its the regular changes.

[gttjames]

10/40 here

[Mudslinger]

ive always used the mobil 1 motorsport stuff 15/50 next change ive been recomended to try Motul 300V competition 15W50 both pretty expensive oils :)

[sphinX]

Same as mudslinger

[J$£5GTT]

Just use the cheapest semi-synth you can find.


:agree:

[Duncan Grier]

Miller CRS 10-60W was what I used to run in my silver C1J powered beastie :D

Think tbh regular oil changes and prob any half decent semi-synth would be fine :)

Guess it may depend a bit on spec of car / turbo to your choice also

[mightymanx]

i spoke 2 a mechanic at our local car accesory place (fast parts) he looked in a book and said 15/40 comma xt2000 semi synthetic is best suited.


am after this oil but cant find it on my isle werd u get it?

[one owner]

New poster! (less than 10 posts)

Done nearly 100k using Mobil 1 fully-synth 0/40 changing every 6k

[Matt Cole]

Oh dear god, not this one again! Comma aint the best for high temps or high rpms, it breaks down and ends up out of the exhaust (proved this at Motorscope rr day) I swapped to mobil super s 10/40 (Available from halfords on offer at the moment for 19 quid) and then ran the car at another rr day. Reved to 7800 rpm and maintained oil pressure and temp stability.

Tried all the rest from bad to worse:

Mobil 1 fully-synth 0/40-far too thin for a 1950's sloppy toleranced engine/rattled my lump.
Miller CRS 10-60W- wrong grade/oil pressure was slightly higher tho.
comma semi synthetic 10/40.- good for general use, no good when thrashing it.
Shell Helix Semi Syntectic 10 - 40- difficult to get, expensive
5w40 fully synthetic Carlube Triple R- Carlube stuff is generally remanufactured oil, i wouldn't use it. (Scource opie oil rep) and local motorfactors.

Also used valvoline- that was good and smoothed the engine out 15/40 grade. only came in 4 litre tubs at the time so had no spare.

Im using halfrauds in tyhe 225 engine at the moment, only because its dribbling out the bottom. After that, im going mobil super s.

[Frix]

Oh dear god, not this one again! Comma aint the best for high temps or high rpms, it breaks down and ends up out of the exhaust (proved this at Motorscope rr day) I swapped to mobil super s 10/40 (Available from halfords on offer at the moment for 19 quid) and then ran the car at another rr day. Reved to 7800 rpm and maintained oil pressure and temp stability.

Tried all the rest from bad to worse:

Mobil 1 fully-synth 0/40-far too thin for a 1950's sloppy toleranced engine/rattled my lump.
Miller CRS 10-60W- wrong grade/oil pressure was slightly higher tho.
comma semi synthetic 10/40.- good for general use, no good when thrashing it.
Shell Helix Semi Syntectic 10 - 40- difficult to get, expensive
5w40 fully synthetic Carlube Triple R- Carlube stuff is generally remanufactured oil, i wouldn't use it. (Scource opie oil rep) and local motorfactors.

Also used valvoline- that was good and smoothed the engine out 15/40 grade. only came in 4 litre tubs at the time so had no spare.

Im using halfrauds in tyhe 225 engine at the moment, only because its dribbling out the bottom. After that, im going mobil super s.

taken from comma website, i use it with no problems!!!!
Motorsport 5w-50


Fully Synthetic 5w-50 Motor Oil specially formulated for Motorsport - Race Track, Road and Rally.
Ideal for use in both petrol and diesel powered cars, go-karts, stock cars and dragsters.
May also be used in engines using alcohol fuels.
Offers enhanced anti wear protection when operating at extreme RPM.
Increased detergency helps guard against high temperature deposit build up.

[Rusty]

I've been using Tesco's sunflower oil, i wondered why it was running like a pig :confused:
Didn't think it mattered what sort of oil you put in :eek:

[Frix]

I've been using Tesco's sunflower oil, i wondered why it was running like a pig :confused:
Didn't think it mattered what sort of oil you put in :eek:

:rob:

[The new Bill J]

taken from comma website, i use it with no problems!!!!
Motorsport 5w-50


Fully Synthetic 5w-50 Motor Oil specially formulated for Motorsport - Race Track, Road and Rally.
Ideal for use in both petrol and diesel powered cars, go-karts, stock cars and dragsters.
May also be used in engines using alcohol fuels.
Offers enhanced anti wear protection when operating at extreme RPM.
Increased detergency helps guard against high temperature deposit build up.

Well they're hardly likely to say that their products are crap are they? :laugh:

[Frix]

Well they're hardly likely to say that their products are crap are they? :laugh:


well they're hardly likely to falsely advertise!! :laugh::laugh:

[Mart]

Really? You'd be surprised... :cartman:

[Sparkie]

fuchs 15w50....

[Os8472]

I've always used halfrauds 15/40 semi synth but every since I've been using the VNT and the cam I've been finding it starts to break down after sustaind trashing so I've switched to Mobil1 15/50 fully synth

[mightymanx]

so i tried a semi sythetic 10-40 oil .
but i think i need something a bit thicker its a renault 5 gt turbo .
143 tho miles so what oil would people recommend lol?

[royz]

will 5w 30 do any damage.

[renault5gtboi]

use prolong oil!!! ither 10w-40 semi synthetic or 15w-40 semi synthetic
check out thair tests they do when they put sand in a engine with prolong and then let out all the oil and rag the car around the track and the engine still works as a sort of lining is givern for extra performence check out the tests on youtube !!:p not cheep tho cost me £45 for 5 lts

http://www.youtube.com/watch?v=oNSGGDwJcEY&feature=PlayList&p=2214171256CE8E20&index=0&playnext=1

[royz]

only reason i asked was i topped up using the stuff i put in my ford by accident and have noticed a burning oil smell since.

[Adam L]

only reason i asked was i topped up using the stuff i put in my ford by accident and have noticed a burning oil smell since.

Was that because you spilt it everywhere while topping up?

[royz]

no. i always put some rags around when topping up as if i dont then i spill it:laugh:. my own fault for being to lazy to use the funnel. ill keep a eye on it and if im stil not happy ill change the oil and filter over the weekend.