Are engine oil treatments actually any good?

Question

I was looking at the engine oil treatments that are on the market and was wondering if they are actually any good, they make some quite big claims on the bottles

Does anyone have any first hand knowledge of how good they are?

Also, is it worth using them on an engine that has already got 90k on it? (diesel)

I'm aware of the stuff for flushing the oil out I'm talking of the things like Slick 50 and Wynns?

Answer 1

ive never used any and it's not uncommon for my vehicles to run 200,000-300,000 miles without engine trouble. the only additives i use is a lubricant additive for the auto transmition. and thats only when i do a fluid change every 100,000 miles or so. those additives are a wast of money. if you drive your car correctly and do the proper things your car will last for years. It's also nothing for me to run up to 10,000 miles between oil changes (not all the time)

Answer 2

Slick 50 is a fantastic product, it will defiantly contribute to a longer life expectancy of the engine.
One other thing to do is change the engine oil slightly before the normal service intervals. Unlike a petrol engine, a diesel engine allows fuel to mix with the engine oil resulting in the oil breaking down rapidly.

Answer 3

Best stuff I've ever used was a product sold through GM dealer's called Engine Oil Supplement or EOS.
Slick50 is just 50 weight oil with graphite and can plug up your oil filter--also not good for winter cold as it gets too thick for starter to crank over engine, as is STP, same thing--50 weight oil. Changing oil at regular intervals with a good quality oil for diesel's---never Pennzoil---is recommended.

Answer 4

The oil companies invest huge amount in research when producing engine oil and produce very good products. If there were additives that really did improve your engine performance, wear and tear etc then I am sure that they would include them in the mix and shout from the roof tops the superiority of the oil. Stay away from them as they could cause other problems with the engine.

Answer 5

Gunk motor flush is the best. You can only use in right before you change your oil though. Another thing that helps keep an engine clean is Shell Brand V-Power Premium Gas.

Answer 6

Oil treatment only help new motors.Although Detergents will help flush old sludge when changing oil.Did you know that a can of black pepper will plug a large rust hole in an old radiator when added to strait radiator water?It reacts with the air and does not clog other ports,just the hole.Immediate results.Incredible.

Answer 7

Some yes and some no. You don't need to spend a lot of money on the products the $3 stuff works just as well as the $20 stuff. But with all of the conditioners and additives that are already in the gas you won't see much improvement unless your fuel system is already dirty/fouled from bad gas or a dirty/rusted tank etc.

Answer 8

Engine oil treatments are designed for newer engines. Seeing as your car has high miles on it I would steer clear from engine oil treatments as the oil treatments can loosen clogged oil from your engine and clog your oil ports causing your engine to be starved of oil and seized in the extreme circumstance. Even in newer engines I would not use these treatments.

Answer 9

Some are. STP makes it easier to start your car in very cold weather, Marvel Mystery oil is good for quieting noisy valves. But so many are called "mouse milk" and do absolutely nothing.
Best advise, ask a mechanic.