Why do people use lucas "oil stabilizer"?

I personally change my oils every 15,000 miles and I use Rotella 15w-40 with 1 gallon of Lucas. In my case mixing 1 gallon of thick Lucas with 8 gallons of 15w-40 it doesn't make my oil to thick. Lucas makes my oil lube everything better and protects in my opinion. This is how I have done it for the last 5 years and I haven't had any problems.

 

A buddy of mine just started this with his last oil change this week.
Personally, I figure that the Delvac I use has everything I already need in it - for my engine.

But, maybe I'm wrong.

Gee...Remember STP oil treatment?
I used that - but only for assembling engine bearings...

 

If your not having any issues that would require the use of Lucas then adding it at every change is a waste of your time and money.

There are times when it can help the engine.

 

If your sampling your oil and the wear metals go up.
If you have fuel dilution.
If you have coolant saturation.


Basically if your oil is breaking down at a faster rate due to other problems then adding Lucas can protect the engine until you find or get the problem fixed. Not saying to ignore the problem but if your sampling like you should then most likely you'll catch the problem. Like I said not just because. But it won't hurt anything but your wallet.

Also there are EGR trucks running Eco-pure systems that are going 100,000 miles and then some without a full drain.

 

They got an oil sample that said "oil stability: -54"
Ideally you want oil stability readings above 100.

 

I agree that it thickens but I don't think it does to the degree your thinking. Plus no one said just because you buy a gallon you have pour the entire gallon in at once.

I never said it protects better. I said in certain cases to use it and pointed out IMO examples of those cases.

I'm gonna take a guess and say you don't feel synthetic oil is better than petroleum either?

 

I don't know about the bigger diesel engines, but I've used Lucas in my (extremely) high mileage gasoline engines for decades without issues. Indeed, Lucas Oil Stabilizer has helped me get more engine life over the long term. Basically, oil stabilizer has prevented ancient engines from dying on schedule, and saved me time and money on having to purchase either another engine, or an entire car at times when I could afford neither.

Since I can usually only afford vehicles that are on the raggedy edge, I've gotten really good at extending the life of my vehicles beyond any mechanics expectations, especially when one considers the amount of abuse my vehicles undergo on a regular basis (plenty of stop and go traffic, hard pull grades, idiot drivers completely surrounding me, and so on). And when I mean stop and go, I mean stop lights every 50 freaking yards and you never catch any of them on the 'green', they're deliberately programmed that way to prevent 'street racing' (because we've had such a HUGE problem with street racers in freaking Meadville!) Oh, and potholes that would do Pittsburgh or NYC proud.