Which Oil For The Diesels?

Tim Martin · Post by **Tim Martin** » Mon Apr 06, 2009 6:10 am

We are seeing quite a bit of engine issues including engine failures with the 7.3L, the 6.0L, and even now the 6.4L Ford Diesel engines in pk tks and vans. I remain under the suspicion that the oil, its brand and weight may be a factor in these failure patterns. So the question is: What brand (s) of oil do other shops use in these engines and what weights are being used? Obviously your geographic area may have some bearing on your answer.

wwauto · Post by **wwauto** » Mon Apr 06, 2009 6:45 am

We normally use Amsoil 5w-40 or rotella t. We are located in Sussex County Delaware.

brianp87 · Post by **brianp87** » Mon Apr 06, 2009 6:52 am

all fords get bg synthetic except there 7.3L and other diesles we use rotella 15w40

steven kiser · Post by **steven kiser** » Mon Apr 06, 2009 9:57 am

we use 15/40 in all with the exception of mercedes

wheelz · Post by **wheelz** » Mon Apr 06, 2009 10:59 am

we use rottela t 15w 40

steven kiser · Post by **steven kiser** » Mon Apr 06, 2009 11:30 am

the carquest oil has exactly the same qualities as the rotella for less money.

Tim Martin · Post by **Tim Martin** » Mon Apr 06, 2009 12:27 pm

steve: does that apply to all weights of carquest motor oil or just the 15w40?

steven kiser · Post by **steven kiser** » Tue Apr 07, 2009 2:23 am

we looked into all the carquest oil and each on either met or exceeded the manufacturers requirements. i even use their synthetic in the german cars. i was hesitant at first. i would use only mobile one, rotella, castrol, quaker state, etc. i assumed that carquest was alng the lines of the no name stuff. i had a service manager that would investigate things to the bitter end. carquest made the grade. as i've said we use it almost exclusivley. no sludging and it stays crystal clear if the car is serviced correctly. i assume all oils will but i can't say because i only use carquest. when it goes on sale i'll stock up. i can't understand why the oil is cheaper by the quart but it is. at one time i had 3-300 gallon bulk oil containers. now i have 3 cases of each weight against the wall. it not only saves money but it saves space. another old timer trick i use i have a rack where i will hang as many "empty" oil containers up side down. i have enough to fill all my oil cans and such. in the coarse of a year i bet i get 50 gallons. it's mungrel but the least i do with it is add it to my waste oil heater. i recycle the oil containers along with the cardboard containers.

Tim Martin · Post by **Tim Martin** » Tue Apr 07, 2009 2:56 am

anybody ever heard of Schaeffer Oil? In our area here (southern pa) its going strong. never had heard of it until recently. I tend to be a little skeptical of a new name until it's proven. How about King Oil?

Stewart Levy · Post by **Stewart Levy** » Wed Apr 08, 2009 8:23 am

Have many fleets with diesels and we use shell rotella 15/40 ONLY! Have had one Not One engine fail! for oil related problems.

fortknoxx · Post by **fortknoxx** » Wed Apr 08, 2009 9:00 am

rotella t

LRAMP · Post by **LRAMP** » Tue Jun 30, 2009 10:35 am

We do quite a few diesel farm trucks and use Chevron DELO 400 15W-40 with excellent result.
LEO RAMP
RAMP AUTOMOTIVE
LAMPASAS.TX

ricmorin · Post by **ricmorin** » Tue Jun 30, 2009 11:06 am

LRAMP wrote:We do quite a few diesel farm trucks and use Chevron DELO 400 15W-40 with excellent result.
LEO RAMP
RAMP AUTOMOTIVE
LAMPASAS.TX

Welcome to the forum, Leo.

Tim Martin · Post by **Tim Martin** » Wed Jul 01, 2009 4:06 am

ya, good to hear from my peers. Thanks for the feedback!

Rich · Post by **Rich** » Wed Jul 01, 2009 5:21 am

If it don't get Rotella T it goes without.

TRANSDOC · Post by **TRANSDOC** » Wed Aug 19, 2009 5:37 am

ROTELLA 15/40 HANDS DOWN

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