Why oils aint oils

[natas33]

So a guy on a board once got me thinking about how modern massive turbo diesel trucks can withstand so much crap hauling thousands of lbs down the road, and car oils get toasty after a few thousand miles of street driving.

One day I began using Fuchs heavy truck 15w.40 diesel oil in all my cars. The engines have never ran smoother, more powerful, and I swear this stuff doesn't need changing for 15,000+miles in a passenger car engine :laughing6:

Seriously, can they get away with selling the same oil for a rig designed to haul loads making 2000 ft/lbs torque? They only sell what they can get away with.. to a degree.

15w/40 diesel truck oil is the best thing your street or race engine ever had. sure you might lose 10hp versus a thinner weight oil.. but the money you'll save in oil changes, after several years you can buy a new engine :frog:

 

[Cornpatch MO]

If an automobile had the same size pan and capacity as a diesel engine, I would expect it to go a long time between oil changes..................................MO

 

[sleepar]

The oils are better just old rotella before they changed the label.. is not 2014 rotella... that was the $hit 5years ago....

 

[natas33]

If an automobile had the same size pan and capacity as a diesel engine, I would expect it to go a long time between oil changes..................................MO

But.. the diesel oil in the same automobile.. (that was previously using car oil) ..... seems to be lasting much longer

 

[Cornpatch MO]

But.. the diesel oil in the same automobile.. (that was previously using car oil) ..... seems to be lasting much longer

I used to run Rottella in my car until they started removing ZDDP from it. Now I use just plain Valvoline 10-40 with a ZDDPlus additive in it. I used Rottella for many years in my trucks. How do you tell how long your oil last? .............................MO

 

[coronet340]

I run Castrol Edge in my vehicles. I change my filter at 5k and oil every 10k. Probably could go even longer.

 

[Herr_Poopschitz]

..... seems to be lasting much longer

Have you sent samples of each in for analysis? If not, 'seems' doesn't hold much weight.

 

[Funship32]

Have you sent samples of each in for analysis? If not, 'seems' doesn't hold much weight.

Ouch! It appears that the "prove it" gauntlet has been thrown down!! ;)

 

[Photon440]

After using only synthetics once a year and nearly 200,000 miles, my wife's 1991 Plymouth Laser still has honing marks on the cylinder walls and no trace of wear. Then it broke due to a faulty (Contitec) timing belt.