I just looked at some of the magnetic oil pan heaters at Autozone and was wondering if any of you out there have used these or other heating devices. It is a magnetic heater that is abour 4"x4" and has 300 watts of 120 electric usage.

Is the oil pan metal on the 5.4L?

Will it heat enough at freezing to 0 deg. F.?

Will it heat the oil TOO much (using synthetic oil)??

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'97 F150 Red/Silver Lariat, SC, 157" wheelbase.
Factory Equipment includes: 4x4, 5.4L, Automatic, 3.55LS, Grey leather, Power bucket seats, HD Tow package, Rear sliding window, Ford bed Liner, electric shift on the fly.

Aftermarket additions/modifications: Superchipped, Bug deflector, Window Drip edge guards, Sony 10 Disk CD changer, Chrome Nerf Bars, K&N Air filter, Air box Modification, 2-1/2" True Dual exhaust with chrome tips out the back, 36" glass packs, 265/75/16 Michelin LTX A/T's, custom rear spring pack, cranked torsion bars, Extang Tonneau cover.


Future additions: Hellwig bar, tinted front windows, still looking for "good" floor mats?.

 

Redone, I have seen those before, I use a silicone heat pad rated at 75 watts. The 300 watt will work but it will use alot of electricity compared to a heat pad. Heat pads also come rated at 150 watts. I keep mine plugged in all day at work and three hours before I leave home in the morning. It will warm the oil at 0 deg F without a problem. My truck has a 4.6 and the oil pan is sheet steel. The heat pad keeps the oil warm to the touch at the pan.