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OIL Viscosity
#1
what oil viscosity is recommended for our engines? I,m currently using 10w40. Should I go heavier to 20w50 or even go single grade?

Alan L

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Alan L
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#2
not2old;22508 Wrote:what oil viscosity is recommended for our engines? I,m currently using 10w40. Should I go heavier to 20w50 or even go single grade?

Alan L

10 - 40 should be fine for area / temps

Ohio Mustang Supply
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#3
10w-40 or 10w-30 is fine. 5w-10 or 20 can sometimes show up as more engine oil leaks, or the engine seeming to burn up the oil.

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#4
I use Castrol GTX 10w40 High Mileage. The "High Mileage" supposedly contains additives more suitable for older engines.

mike


What oil viscosity is recommended for our engines? I,m currently using 10w40. Should I go heavier to 20w50 or even go single grade?

Alan L

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#5
not2old;22508 Wrote:what oil viscosity is recommended for our engines? I,m currently using 10w40. Should I go heavier to 20w50 or even go single grade?

Alan L
Use an oil with a high zinc content, like Valvoline VR-1 or others designed for flat tappet cam engines. I would use 20w50 if your oil pressure was low, if not 10w30 or 10w40 would be fine


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1972 Mustang Convertible 351C 4V
1966 Ford Galaxie 7 litre-4speed

Jorge
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