Spec for a new *gas* engine might be that.
400 for a diesel is a reasonable target.

Make sure you inform the alternative fuel forum on this board too!

If you don't mind the asking here, what's your latitude / zone in the world, and how have you heated the WVO / SVO near and up to the IP, and beyond - using ILH?

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Cheers!
Scott McPhee

1987 300D