Usually the warmer the better... when i first pull out of my house it runs a little slow, but when i get going it rides much smoother.... And if you rev. your diesel while it's very cold or your driving after you just cranked it will ruin your pistons and cylinders
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-Old ride-82 Luv diesel 5spd with some upgrades
-Past rides-82 Sierra, 78 Coupe De'Ville, 91 2dr Blazer, 86 RX7, 86 Porsche 944T (rear-ended and totaled)
-Curr. rides- 1970 Ford LTD 4dr, 390 4Bbl, 2nd owner! With a few Extras
00' Civic beater...