Oil pre-heater
 

I just got a couple Moroso 23991 400 watt probe type heaters and I've been told they can scorch the oil. I notice that the Stefs is a much lower wattage. Which oil/trans oil heater do you use? Thanks for your advice.

Re: Oil pre-heater
 

For engine oil, a Kats watt magnetic heater...steel pan, of course. For the trans, a Zero Start heater with a 1/2 NPT bung welded to the trans pan. -Al

https://i.imgur.com/TBN1WXfl.jpg

Re: Oil pre-heater
 

Got a few of the Kats 300 watt magnetic heaters. Gonna have to get something different for the EF/S car, Aluminum pan.

Re: Oil pre-heater
 

I’ve used the Moroso external heating pad for a couple years now. Takes about 30 minutes to heat the oil. Sticks on, they have different sizes or a model that attaches with springs.

Moroso 23996 - Moroso External Heating Pads

Kelly

Re: Oil pre-heater
 

We put heaters in the oil pans and hydraulic tanks of heavy equipment on a regular basis, the general rule was no more than 10 watts per square inch of heating element. High wattage units made for water will cook the oil. More info here, https://www.warrenelectriccorp.com/a...rs/default.asp

Jim Mantle V/SA 6632

Re: Oil pre-heater
 

I siliconed the Moroso heater to the bottom of my aluminum pan worked great, but would leave it on for only about 30-45 minutes.

Re: Oil pre-heater
 

Thanks for that information Jim. If my math is correct, this heater has 63.69 watts per sq. in. I guess I'll send both of them back. The heating probe is 4" long and .5" in diameter with 400 watts.

I tried a stick on pad but when I saw smoke coming out of the diaper after a few minutes, I took it off.

Re: Oil pre-heater
 

I'll check these out Alan, thanks

Re: Oil pre-heater
 

Definitely look at the Stef's heaters ---either the pad or the in the pan style---the in the pan style is for use in OILS --the Moroso style heater is for WATER---Go to Stef's website read about their products--- other suppliers may make a similar product but the Stef's style will not scorch the oil because of its design---the only difference between using it in a steel or aluminum pan is the bung that you weld into the pan steel for a steel pan and aluminum for an aluminum pan-- FED 387

Re: Oil pre-heater
 

Some have used a plumbers pad, available at Lowes, to protect their diaper. Pad has to be sealed around the edhes to the pan if it peels it will burn itself up.

Re: Oil pre-heater
 

If it's for water they shouldn't market it for oil. This is directly from the Moroso website (notice the 212 and 400 watts of power statement):
Heater element designed specifically for heating oil; does not scorch or boil like "converted water heater" designs
212 watts of power raises temperature of 12 quarts of oil 60 degrees F in about 25 minutes
400 watts of power, 110-120 volt rating
Aluminum, 1/2" -14 NPT weld-in bungh and 3 ft. cord included
Length of heating element is 4-3/4" from fitting to tip

Re: Oil pre-heater
 

I know which one I'd use and it's the same one we have used in multiple engines--As far as the pads go we have used them ONLY to preheat the differential never the oil pan itself-- Your choice use what you like if it works great for your application terrific. AS LONG as you use the type that is totally sealed unlike the one in the picture you should be OK also remember the "2 piece" type the connector has a habit of loosening up and you have to be aware of this constantly check to make sure its screwed on tight ---FED 387

Re: Oil pre-heater
 

The Phillips-Temro heater pictured is a stainless steel, low wattage heater specifically designed for oil. In several seasons of use, the screw connection has never become loose.

Re: Oil pre-heater
 

I have used the pad and the phillips type oil heaters. The phillips is the way to go for me. Never had a problem with it.