Hey Joe,
When all else fails, read the instructions!
For others that may not understand;
Thats the little book that should be in the glove box.
Attached is the relevant page.
You may notice that 15w40 is good down to +23F
10w is good for -4F
Given that every car had an owners book when new, I often wonder where they have all gone.
__________________
Grumpy Old Diesel Owners Club group
I no longer question authority, I annoy authority. More effect, less effort....
1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving