Which engine oil and why?

[Full Throttle]

Hello people, I have done some research on what engine oil I should run in a 2000 Tuscan Speed 6, which has completed very low mileage.
I have been advised on several options:-

10/40w Semi Synthetic
10/40w Fully Synthetic
0/40w Fully Synthetic
5/50w Fully Synthetic
10/60w Fully Synthetic

I would appreciate peoples opinions on what engine oil they use/recommend and why.

Thanks

[Mark A S]

10/40w Semi Synthetic, as it is recomended by TVR Power for my warrenty.

[jonesy]

Same recommendation from Str8Six, 10/40 Semi

J.

[WorAl]

I don't get it, 10w-40 Mobil 1 is for high mileage cars. I use 0w-40 Mobil 1 and have had no troubles so far. Reason - my own choice, but on the logic that it is a thin oil and having an almost new engine. Will use thicker oil as the engine wears more.

[beano500]

WorAl said:

I don't get it, 10w-40 Mobil 1 is for high mileage cars. I use 0w-40 Mobil 1 and have had no troubles so far. Reason - my own choice, but on the logic that it is a thin oil and having an almost new engine. Will use thicker oil as the engine wears more.

+1

All added to by the fact that my Owners handbook says: 6000 miles on - Mobil 1 0W40. I just checked.

[stimshady]

i use Shell 5W/40. I seem to remember that getting recommended by a number of people.


I found this on the net:

The low viscosity, rapid oil flow and low friction of the product ensures easy cold-starting and greater fuel efficiency while the shear stability of the product ensures maximum protection at the normal operating temperature. This product was developed in conjunction with Ferrari to ensure your engine is clean and protected allowing your engine to work at maximum performance...
http://www.ciao.co.uk/Shell_5W_40__Review_5750217

Edited by stimshady on Thursday 11th February 15:50

[brem]

Owners Handbook of my 2002 Tamora says Mobile 1 0W40.

Owners Handbook of my 2005 Tuscan S says Carlube Trible R 5W40 Fully Synthetic

And Jason from STR8SIX mailed me just a few days ago: We use 5w40 Mobil Synt S.

[thainy77]

I use 10/40w Semi but it depends how you use your car, there have been plenty of threads on this, a few of the hardcore trackday guys use 15/40w.

[truck71]

Folks, any recommendations on most competetive oil suppliers particularly Mobil products? Cheers.

[beano500]

truck71 said:

Folks, any recommendations on most competetive oil suppliers particularly Mobil products? Cheers.

Costco - has been £27-ish for 4l of 0W-40 IIRC.

[dvs_dave]

0-40 is way too thin for the Speed 6 as its tolerances aren't tight enough. It'll disappear out of the exhaust pipes in no time!

I've heard the only reason Mobil 1 0-40 Fully Synth was specified in the handbook was because TVR got a job lot deal on it.....hence the different specs in later handbooks. I'm surprised TVR would do something like that.

[WorAl]

dvs_dave said:

0-40 is way too thin for the Speed 6 as its tolerances aren't tight enough. It'll disappear out of the exhaust pipes in no time!

I've heard the only reason Mobil 1 0-40 Fully Synth was specified in the handbook was because TVR got a job lot deal on it.....hence the different specs in later handbooks. I'm surprised TVR would do something like that.

Well mine hasn't, been in the car for 8 months and not a drop has been used.

[beano500]

WorAl said:

dvs_dave said:

0-40 is way too thin for the Speed 6 as its tolerances aren't tight enough. It'll disappear out of the exhaust pipes in no time!

Well mine hasn't, been in the car for 8 months and not a drop has been used.

Similar - I was quite used to losing a litre every 1000 miles or so in the Griff on thicker stuff. The Tuscan hardly needs a drop extra between 2-3000 mile services - it's into its late 40s now.

Clearly every car's different, but what does that say?

Edited by beano500 on Friday 12th February 09:04

[packman10_4]

I use Silcolene 10/50 with Ester , good oil pressure , engine less nosiey and uses less oil.

[RM75]

Str8Six used 5w-40 fully synthetic when they serviced mine. I have some Silkolene 10w-50 that I used to use in my Impreza, and I'm going to put that in soon, just to see if I notice any differences.

Edit: Having looked up Mobil Synt S, maybe what str8six used was only semi synthetic.

Edited by RM75 on Sunday 21st February 10:25

[tail slide]

RM75 said:

Str8Six used 5w-40 fully synthetic when they serviced mine. I have some Silkolene 10w-50 that I used to use in my Impreza, and I'm going to put that in soon, just to see if I notice any differences.

Edit: Having looked up Mobil Synt S, maybe what str8six used was only semi synthetic.

Edited by RM75 on Sunday 21st February 10:25

As the oil is the most critical protection our engine parts have, I'm sticking with the same recommendation you have, from the engine builder that TVR employed to rebuild the early failed S6's to be reliable.

10W50 is way too thick which means that it will flow less, and I've learned the hard way that oil flow is critical on these engines and can easily be reduced by minor mods or poor build tolerances, with disastrous results.

Edited by tail slide on Tuesday 23 February 19:55

[Laser Sag]

I thought that TVR Power did the engine rebuilds and they use / recomend 10/40 semi synthetic.Based on their confindence to provide unlimited mileage warraties on their rebuilds I for one will stick with that until someone with Doms experience convinces me otherwise.Can only speak from my own experience but (touch wood) 2 x 30000 mile Tuscans and a 35000 mile Sagaris seem to have faired well on a diet of the above.
Kev

[Tuscanuwe]

Tailside wrote:
10W50 is way too thick which means that it will flow less, and I've learned the hard way that oil flow is critical on these engines and can easily be reduced by minor mods or poor build tolerances, with disastrous results.

---

I have also changed from 5w50 to 5w40, engine much quieter when cold, i think oil coming faster to lub oil points. Due to low oil temps 5w40 should be more than sufficiant for this engine and pressure is still good!

Flow is more important than pressure,because the flow takes the heat away!

Uwe

[T450t]

Tuscanuwe said:

Tailside wrote:
10W50 is way too thick which means that it will flow less, and I've learned the hard way that oil flow is critical on these engines and can easily be reduced by minor mods or poor build tolerances, with disastrous results.

---

I have also changed from 5w50 to 5w40, engine much quieter when cold, i think oil coming faster to lub oil points. Due to low oil temps 5w40 should be more than sufficiant for this engine and pressure is still good!

Flow is more important than pressure,because the flow takes the heat away!

Uwe

I think you will find that 5w50 is exactly the same as 5w40 at cold start up.

[fairclp]

10W40 Semi Synthetic in the Sag.

Edited by fairclp on Thursday 25th February 00:44