Is this conventional or synthetic blend? The label differs from the description. Please clarify the description of this product.

Been using this in my Cummins last few changes. Seems fine. I like the rebates. Has a solid following from diesel me mechanics. It’s name brand stuff at a good price. Works for me

Mobil has always made the best oil. This one is no exception, I use it in my Motorcycle with a wet clutch system and no slippage what so ever. Price can't be beat.

This oil is excellent to have as back up. I use it for my two trucks. It is good and cheap. It is a great way to save. Specially when you buy it online and get it right on your door entrance !

can't beat the price from walmart been using mobil delvac 15w-40 in big bucket cat engines for decades 450,000 mi main and rod bearing roll out showed no wear

Tried it for the first time in my 02 f250, it loves it, seems to run smoother and stronger . checked the oil later with over a 1000 miles on the oil and was still pretty much clean on the stick. LOVE IT.

The packaging does not indicate that Delvac 1300 is synthetic, however, if you visit the Mobil website this oil is a synthetic blend. Works great in my Duramax

I ordered 18 gallons online and they were almost $3 cheaper than buying it in the store! we received it at home 3 days before we were expecting it too!!!

I order MANY of these cases (like 30 of them) when they were on sale, and all of them arrived just fine via FedEx. At the time of the sale, is was cheaper per gallon than buying a 55 gallon drum. Right now, it's about a buck more.

Best Diesel engine old I have found, and I've tried them all over the past 45 years of running Diesel trucks and equipment and rebuilding those diesel engines.