I've been 4136'ing since 1988 and home office'ing for over 8 years now probably.
I have heard the home office is often a high abuse area that they look into, but have never heard the credit for tax on fuel being a red flag item?
Your not using this fuel in a DOT approved vehicle on the road, so why pay tax on it?
We already save all our gas receipts. I always fill up mowers separately from the truck, so the receipt is 100% accurate. The truck gets filled on a separate pump. Truck receipt has truck mileage written on it, and mower receipt has mowers written on it.
I take the receipts and add them all up at tax time. Simple and easy.
As for the truck....as long as you have another car/truck for personal use, and just use your work truck for 100% business. It's so much easier that way.
2004 GMC 2500HD Reg Cab BOSS 9.2 V-Plow
2013 eXmark LazerZ X-Series 60" 34hp EFI (RED) Kohler
2006 Hustler SuperZ 28EFI 60" Power Chute Design OCDC SOLD!
1996 48" SCAG Belt WB 14hp Kawasaki Classic Deck
Echo 2 strokes PB-755 & SRM 280
Eastman WM20H 20" Commercial Push mower (NEW for 2013)
Commercial Lawnboy trim mower 3-FOR SALE!http://www.lawnsite.com/showthread.php?t=424203
Solo since 1980