Oil for Tamora Speed6

[gb61390]

Read in a few threads about the variety of oil that people have heard recommended for their Tamoras so have just phoned the Factory Service Department.

They are now using Carlube RRR.

They stated that this is not because it is better than Mobil 1 but just because they have a better financial/sponsorship deal.

They also stated that they (and the dealers) will probably use up their stocks of Mobil 1 first.

Bottom lime is that there's no real difference.

Cheers.... Andrew

[lrussell5]

thanks. but only for 6000 mile+? what are the two run-in oils now if not mobil devlac and super? or do we care.....I'll get my coat

[gb61390]

Didn't ask them that much detail!
I suppose the real answer is for the first 1000 miles you use what the factory put in. You shouldn't need to top it up anyway?
After that it's whatever the dealer uses?
Cheers.... Andrew

[flasher]

Andy

Mobil 1 may not be the best, they only encouraged the use of that because of a sponsorship deal too...

A good TVR mechanic told me to use Castrol Formula RS and the car has been really good on it, also TMS use it too...

[gb61390]

Thanks Flasher. As the car's full of Mobil 1 now I suppose I should continue to top it up with Mobil 1 until the next service so as not to mix them?
Cheers.... Andrew (the one who know's bugger all about how cars work!)

[Toffer]

Here is what Castrol say: -


We have met some concern about the use of synthetic oils, in that they have been attributed to causing low engine oil pressure when hot. We would like to clarify the situation. To this end, we have contacted Castrol (UK) Ltd. for their advice and this is their response:

Oil pressure is directly related to viscosity and it is therefore not the difference between synthetic and non-synthetic oils that causes the difference in pressure, more the fact that modern synthetic oils are of a lower viscosity than the A series engine was originally designed for.

Modern, new generation, engines are being designed to run on lighter viscosity oils to aid lubricant flow when cold and provide less viscous drag when hot thereby aiding fuel economy. The lubrication system in older engines is designed to cater for larger working clearances on crankshaft and camshaft bearing journals, valve gear and other moving parts, plus oil galleries will be larger and the oil pump will be of a suitable design to pump oils of a heavier viscosity irrespective of their base oil type.

Synthetic oils are designed to give greater film strength and higher levels of lubricity together with increased thermal stability and better resistance to oxidation. They are also able to maintain their properties when used under arduous or extreme conditions. These special properties also enable lighter viscosity, energy efficient oils to be used whilst offering an enhanced level of protection and performance.

Whilst the lower viscosity of some synthetic oils may lead to reduced oil pressure, it does not necessarily mean reduced protection. However, owners who are nervous of a reduction in pressure should consider using Castrol Formula RS 10W-60 which will give rapid circulation when cold but will retain a substantial viscosity when up to its full working temperature.

Now you read that I think I will keep putting Mobil 1 in the Griff