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jackal2513
Shanghai


Joined: 22 Jan 2009
Posts: 4514
Location: London


PostPosted: Sun Jun 15, 2014 6:24 pm    Post subject: Reply with quote

I've blown up 5 engines in my time and not one of them went bang because of the type of oil used ..... rather, not having enough. Go figure.

in summary: just use a few litres of 'crisp and dry', it'll be fine. Failing that, what is says in the handbook. Thumb
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Chris_in_the_UK
Paul Ricard


Joined: 19 Mar 2014
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Location: Harrogate


PostPosted: Sun Jun 15, 2014 9:32 pm    Post subject: Reply with quote

quattrosteph wrote:
Double ester base oil for track use.
Opeoil or the oilman
Thumb
Change oil+filter often.
You need to pick the right oil as it can affect oil pressure and put some stress on the oil pump.
Trackday is not racing so you need to find an oil suitable for your road use too.


Stress the oil pump?

What a old of old tosh.
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quattrosteph
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Joined: 14 Apr 2012
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Location: Buckinghamshire


PostPosted: Fri Jun 20, 2014 10:52 pm    Post subject: Reply with quote

Oil pump will work harder to push higher viscosity oil . Logic.
An oil with the right viscosity will travel fast everywhere on start up.
The biggest wear on an engine is during the first few secondes after start up so you don't want something too thick for road/fast road use.......
Using much higher viscosity oil can have negative effects : power will go down a little bit, can cause problems with hydraulic lifters, engine temp tend to go up.
These days we have a large choice of top quality oil .
Higher in grade doesn't mean better for a road car anyway.
For pure racing cars it is different.
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NXI20
Approved Trader


Joined: 02 Feb 2008
Posts: 3200
Location: South Bucks

2004 Porsche 996 GT3 Mk2

PostPosted: Sat Jun 21, 2014 12:12 am    Post subject: Reply with quote

On the face of it your contention of increased stress has some merit, however the oil pump is never that stressed because it cannot pump at more than 5 bar due to the pressure relief valve. The contention that thinner oil somehow travels faster is nonsense - a fluid in a given size bore when already primed and pumped at the same rate doesn't flow faster or slower depending on viscosity. It also can't negatively impact hydraulic lifters in either operation or lifespan. What a less viscous oil does do is leave a thinner coating of oil as it settles in a cooling engine & that can mean a greater likelihood that the oil film can break down before it is replenished by the pump. My ECU doesn't turn on the coil packs until it sees 2 bar of oil pressure for precisely this reason.
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Stuart Mackay
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Joined: 29 Apr 2013
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PostPosted: Fri Nov 25, 2016 8:41 pm    Post subject: Reply with quote

http://www.eurocarparts.com/ Black Friday promo code OIL50
Just bought 3 x 5 litres Mobil 1 10-60 for £110 delivered for GT3 and Westy oil change over the winter thumbsup
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