It's a nasty job. There will be fuel all over the ground and all over you, no matter how careful you are. Wear your raggiest garage clothes, nitrile gloves, and have the kitty litter handy.

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1987 Mercedes 300D ~200K (Greasecar & Biodiesel)
1993 Ford F-250 7.3 IDI diesel 165K (Biodiesel)
1996 Thomas/International Bus with DT466 engine