Compression Ignition Addict
Join Date: Aug 2008
Location: Central Texas
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I ran the Shell Rotella T5 since it came out, and when I brought my truck new I switched to 10w30 my first oil change and never looked back. The past two oil changes, I've run the Amsoil ACD 10w30 diesel synthetic...I picked up 1.2 mpg when I first switched from Motorcraft 15w40 to the 10w30. I picked up .3 mpg when I went from the T5 to the Amsoil ACD 10w30...and can go 660 miles to a full tank (29 gallons)...i'm a 23.4 mpg on the highway, at no more than 2000rpm..I've done EVERYTHING I can to get 24mpg, and it just won't happen lol.
I've always been a fan of decreasing parasitic drivetrain loses and increasing fuel mileage.
I would run 10w30 without hesitation (and I've towed with the Amsoil ACD)...if you tow heavy constantly in the summer, 5w40 or 15w40 synthetic may be the better choice.
'07 F-250 PSD 4x4
5" exhaust, zoodad, blue spring, Airaid intake, 6.4 starter, 2.5 f/coils, adj Trac bar, 2" r/add-a-leafs, egr delete, snow plow fan clutch, csf 6028 intercoolerr, DC 185 alt, Bilstein 5100, Barder '03 turbo rebuild w/RR billet wheel, SCT SF3 tuner, F-Detroit Truetrac, R-Detroit Locker, 4:10 gears, hawk LTS, LT315/70r17 Duratracs, Amsoil Gear lube, Delo 400 LE 5w30 diesel, Delo ELC, archoil, bpd ficm, BPD oil cooler, dynatrac pro steer ball joints, arp studs, oem gaskets, HD water pump, stc, plugs, stand pipes, 6.4 banjo bolts,