oil grades E.G 0/40 ETC
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From: ESSEX
oil grades E.G 0/40 ETC
Can someone explain this to me what the first number is and then the second number
if you got a old car with rattly tappetes what grade oil should it be using
if you got a old car with rattly tappetes what grade oil should it be using
As far as I understand it, the first number relates to the cold viscosity and the second relates to its maximum usable viscosity.
In other words, a '0' or '5' (first number) graded oil will work well from cold, but offer little protection to a worn engine.
A '50' or '60' (second number) grade oil will be effective at higher temps, so for use in a powerful car.
To quieten that tappet's down, I would suggest a 5w40 or a 10w40.
Not saying I am definately right though.
In other words, a '0' or '5' (first number) graded oil will work well from cold, but offer little protection to a worn engine.
A '50' or '60' (second number) grade oil will be effective at higher temps, so for use in a powerful car.
To quieten that tappet's down, I would suggest a 5w40 or a 10w40.
Not saying I am definately right though.
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wowk
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Mar 30, 2021 07:49 PM