Oil and filter for high mileage engine

[mikeh]

Im doing Silverstone next month and plan on doing the oil before I go. Now I don't believe that the OEM recommendation is still optimal for both a high mileage engine and the stresses of track work.

Thoughts?

 

[Fred@BTM]

0,5,10 W 50 or 60

 

[edde]

Stock spec is fine for older milage

As for stress of track the issue is the engine get very hot and oil temps get high so you nee decient spec oil and if its track use only a 50 weight oil not the 40

 

[mikeh]

Thanks Fred.

Any chance you could explain your recommendation in a little more detail?

Is the use of a thicker oil to aid the high mileage or track stuff or even both?

You mention 0, 5 or 10W - Is there anything that should impact my choice here, or do I just stick with 5W?

 

[edde]

Is the use of a thicker oil to aid the high mileage or track stuff or even both?

You mention 0, 5 or 10W - Is there anything that should impact my choice here, or do I just stick with 5W?

The second number in the oil is its viscosity at a set temp. On track your oil gets hotter than normal so you need oil which is the same viscoity as normal running. So for going for oil which is thicker at a normal temp when its being used at higher temsp on track its as viscious as the 40 oil at normal temps.

0 5 or 10 doesn't realy matter thats the cold temp viscocity when the engine is started.

 

[Fred@BTM]

first number is the viscosity measued at 0degC technically the lower the number the better, but a 0W is safe down to approx -25degC, so not really needed in the UK, a 5W is fine possibly even a 10W (more summer though)

second number is viscosity measured at 100degC, the higher the number the "safer"

IMO all track cars should be using at least a 50