Oil temp too high?

I'm guessing it's not Lucas per se, rather any additive. The oil companies spend billions of dollars to get the oil right, then you dump in some thickener and undo all that research. If the engine is on the way out, an oil additive helps get more mileage, but in a healthy engine, it shouldn't need it.

 

250F is where you hit the danger zone with any kind of oil. Oil breaks down and fails extremely rapidly above that point.

 

Exactly. The only thing lucas is good for is if you need to buy time to get the funds together for a rebuild.

 

You'd freak if you drove a newer d13. My oil drops as low as 236 but runs up to 244 all day, no matter the temp outside.

 

Ive had pulls that will essentially destroy the engine very complete if the oil started breaking down beyond 250. But these pulls were really extreme.

Usually if a engine oil temp escaped the 220-230 range and started risiing without a pull going on, I expect the coolant temp to also begin to rise as will the pyometer. To me that means a problem with cooling.

With the new computer trucks up until the time I stopped, there were very few gauges to go by on the dash, only computer codes for trouble if something is out of line on it. I have not subjected a computer truck to the kinds of pulls Ive talked about over the years. Those honors go to the old mechanical engine and manual transmissions. I remeber southern Ohio going across a series of what I called sawtooth ridges and I recall when I finally got to what is considered flat ground halfway up the state, it was a few hours before that monster COE detroit finally settled down. I won't be going across ohio like that again south to north on those sawtooth. It's essenitally vertical going up on each one.

Im sorry Im not offering hard numbers, only memories that fade over time and only from the older trucks that have the gauges covering the dashboard area in several places. You don't need a modern computer when all the gauges are working and registering properly, YOU are the computer.

 

I "use" to be a Lucas fan until I dug deep in my research about oils. Like @Bean Jr. said and @spyder7723.
I don't even use Chevron Delo either. The formula they use now was causing my engine to have more blow by. So I switched to Guardol ECT. It's a synthetic blend. No more blow by. I have a buddy that swore by Rotella and he even switched to Guardol ECT, he was having the same issue with blow by, finds out that Rotella switch the formula also. My buddy uses it on a B model.

 

Im currently looking into schaeffer oil. And amsoil. Still need to gather more info on amsoil.

 

First time I saw it, I called my friend in a similar truck and asked him what his was running. It was equally high so I felt a little relief,