I'm wondering if you can use Delo 400 15w40 in a Gasoline engine as I have a few gallons of it left over since I switched to synthetic in the Mercedes?

You can, but I'd probably want to use it in an older car with an oil consumption issue, due to the weight of the oil.

ABSOLUTELY!!!!!!!!!!!!!!!!!!!!!!!!!!!

Up until my very most recent cars, I have used NOTHING BUT Delo 400 Multigrade in EVERTHING on my place from lawn mowers, farm tractors, to gas cars and trucks.

Delo 400 and its competitors are termed "Universal Grade" oil and are especially formulated for use in diesels due to their added detergents needed in a diesel for soot dispersal. The added detergent also works VERY well to keep the crankcase in your gas engines squeaky clean.

I could make a list of all the vehicles that I've used it in, but suffice it to say it works great. I will list one gas engine car and that is my 88 300E that has never had anything but Delo and is sitting at 278,000 miles and is still in really tight condition. It uses no oil and has experienced no oil related problems in its life. I pulled the head due to corrosion problems caused by infrequent antifreeze changes and the cylinders still had 100% crosshatch. That was at 170 something thousand miles.

I have only recently started using oils other than Delo in two different vehicles on my place. One is a MINI Cooper with roller lifters and a really overtaxed engine. I use MOBIL One in it. The other is a Ford truck with a 4.6 liter V8. For several technical reasons, I don't use Delo because of it's heavy weight. I use Mobil 5000 in that engine due to roller lifters, and hydraulic slack adjusters that are calibrated for light oil. It took lots of research before I made the decision not to use Delo in this engine.

Everything else on the place still gets Delo. It is a GREAT product and will serve you well.

NOW, all that said, I live in Texas. If you live in a cooler climate, the Delo may be a weight that is too high to use.

Have a great day,

Thank you Larry....

Generally speaking, diesel rated oils do one thing better than non-diesel rated oils, non meaning gas engine acceptable, high levels of detergents that maintain in suspension, dirt, or in a diesels case, soot!

Dirt and soot are filtered through an oil filter, filtered to the point no more can the filter adequately remove from the blood steam, (oil stream) dirt and soot!

To add, synthetic oils, yes they are superior, generally are used to extend drain intervals. Few people actually use synthetic oil to extend actual engine life!

Oil changes at 5,000 miles instead of 3,000 miles. It's a matter of weights and balances, cu tom to you!

This is an old thread, but this was my exact question.

Need to do an oil change for the 91 300E, but have tons of Delo 400 in stock for the 240D, which will not be driven as much any more.

Didn't want to go out and buy "regular" oil and wondered if the Delo was safe to substitute.

Sounds like its ok and may even be better for the gasser.

Anybody with an old car would need to use an oil like the delo diesel truck to protect it, all the current "car" oils on the shelf nowdays have all the anti-wear zink removed , and really dont offer protection.

I use diesel truck oil in EVERYTHING, no matter what season it is. if its cold where you are in the winter--use some type of plug in heater overnite.

Good to know, thanks. I just changed the oil, and it could be my imagination, but it did sound better, LOL!

Guess that's why the Delo is more $$$.

Don't have to worry about cold temperatures, this is Hawaii.

We have blasting sun, rust, mold and other stuff to worry about, tho.

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1991 300E 124.030 103.983KE 722358 03 412178
207K

1979 240D 123.123 250K (Project car)

2000 Ford Ranger, 187K

2015 Dodge Ram 1500 EcoDiesel 37K

I am running the Rotella T in my M110 in my 280E since I had it and it has made the engine quieter and smoother running. I have heard reports of the Mobil 1 diesel oil being another good option for older MB gas engines as well. As was previously posted any good diesel rated oil should be a good option.

when I found out that Rotella T 5w40 worked in my 98 Suzuki motorcycle and my 83 Diesel, it was all I could do not to test it in the Honda Odyssey. It would be so awesome to just buy it by the barrel

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77' 300D, "Cartman" SOLD @ 150K (didn't know what I had)
83' 300SD, "The Superdon" 325k+ @ 28mpg
95 E320 wagon, "Millennium Falcon" 231k+ @ 24 Mpg
95 E300D, "Sherley" 308k @ 33.69 Mpg, currently anticipating a head
99 Suzuki Intruder "Trudy" @ 45 mpg

I have run DELO 400 in my wife's 104 engine (W124) for the past 6-7 years. Just finishing up a top-end rebuild in my garage and the machine shop was quite surprised at how clean the head was when I brought it in. I change my oil religiously at 2,000-2,500 miles. The detergents help quite a bit as has been stated.

Great oil. I buy it in 5-gallon buckets at Tractor Supply to get the cheapest price. The good thing is that you can use the old buckets for used oil.

Cheers,
Gerry


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BMW recommends using 15W-40 on the 1989 E30. You wont find any off the shelves so i've been using diesel oil on it.

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'85 300D Cal 280,000 miles
'14 GLK 350 60000 miles