Re: Engine oil viscosity

Just do not make the mistake other owners have done, only use the appropriate 5W-30 or 10W-30 oils I prefer Synthetic. Using heavier weights in the summer will cause premature oil pump wear and failure.

When I bought my 98 Ram many of my friends started using the 20W-90 racing oils in their new Rams thinking they protected better in the heat. The heavier oil had the opposite affect and many of them were replacing failed oil pumps under 70K miles.

My brother-in-law a Chrysler/GM Tech warned me about heavy weight oils where the manufacturers specified 10W-30 as the heaviest to use. Well, my 98 Ram has almost 200k on it use 1/4-1/2 quart between oil changes all my friends are driving around in newer Fords or Chevys cussing out Dodge calling their engines junk because, their engine did not get the appropriate lubrication. They did it to themselves but cannot see the forest before the trees.

Coasty

If your owners manual says 5W-30 or 10W-30 that is what you should use. There are reasons for manufacturers recommended viscosities.

Coasty

Amen! And in some of the new 5.7L multi-displacement engines, the improper viscosity oil may result in a check engine light being illuminated.

Mike

Nothing wrong at all with using 15w40 in a older engine in hot weather or to help reduce oil consumption in a worn engine. It will not hurt a thing and is a better choice for this than 10w40. It would not be my first choice in a new tight engine unless it got up to 100 or more a lot during that change cycle.

Useing a oil that is made for diesel in a gas engine is foolish for a number of reason's.

Delo used widely and advertised in other countries for gasoline engines also. See below : Caltex Delo Sports - Available in Asia Pacific and Africa & Middle East regions. Delo Sports is a high-performance, multigrade, diesel or gasoline engine oil specifically designed to provide maximum protection for sport utility, sport activity, pickup, and 4x4 vehicles.

From Chevron's web page;

Chevron Delo 400 Synthetic Engine Oil Chevron Delo 400 Synthetic heavy duty motor oil is recommended for use in turbocharged diesel and four-cycle gasoline engines, torque converters, gear cases and hydraulic systems operating in arctic-type climates and high temperature conditions. Using the latest synthetic oil technology, Chevron Delo 400 Synthetic provides excellent performance with either high- or low-sulfur diesel fuels and in extended service applications.

I would think that the additives used in a diesel oil would be different from that used in a gas engine. Also in most cases oil used in diesel engines are more expensive to buy than that used in gas engines.

Roy

Except DELO is an all fleet oil - EXCELLENT for gasoline engines as well as diesel. Like Rotella "T" as well.

The Delo is definitely not the cheapest you can buy, but generally quality does cost more.