The title says it all. Over time I noticed my engine in my 2003 Mercedes e320 has been getting a little noisy. Also I noticed my mpg isn't as good as it once was. This is normal effect of time. I usually change my oil at 5,000 miles, this time around I changed at 4,000. I've gotten a can of Liqui Moly MoS2 Anti-Friction Engine Treatment for free and decided to try it out. It's been in car less then 24 hours and only 30 miles driven and it's actually helping. The engine isn't as noisy and my mpg is getting better. My mpg increased by 1.1 mpg. The cars acceleration is slightly better. Im surprised it actually works, I honestly didn't think anything would happen. While these gains seem minor they actually aren't. These are really good gains. FOR THE RECORD. My engine is in really good shape, there's very little wear, and no damages at all internally. If your engine is worn or have broken, damaged internals this product won't work. For some reason people love to buy oil additives then give bad reviews and cry if it doesn't fix there blown, heavily worn or damaged engine. Products like this are only made to help engines that are still in good condition. I've never used this brand till now How are there other products. Anyone else have luck with Liqui Moly.
If this product works as well as you're claiming, manufacturers would recommend them in new vehicles that have been made since the product was released, or they would deliberately add it themselves and say It's required in the owners manual. The Feds are massively turning up the heat on MPG standards, and they would be all over that constant 1.1 MPG boost with a cheap bottle of additives if it actually worked. They aren't doing that.
You're expecting to see an MPG improvement or hear a difference in noise. Valve chattering due to engine age is because the engine IS worn internally. Engines deviate from their original tolerances over time due to wear from normal use. There's no such thing as an ideal lubricant that completely prevents engine wear. Oil film strength breaks down through use, and cold starts wear parts.
Driving habits have way more of an impact on MPG than some engine oil additive. I got 19.8 MPG out of my '99 Ford Ranger w/ 278k a few weeks ago, typically I only get 16.5-17.5. Driving slower, accelerating smoothly and avoiding braking where possible does wonders for boosting MPG.
If you have the money great. A psychologist once told me -
"If you believe something to be true and act in accordance, the consequences will be real." If you think it works for you, great.
Two videos on the subject.
https://www.youtube.com/watch?v=UnNahISE_nU
https://www.youtube.com/watch?v=h2xExpwV0TE&t=396s
The first couple of sentences from Scotty's vid sums it up.
A quart of 15w40 or any thickener additive would quiet things down too. That's an old sleazy mechanic trick that masks noise.
As for fuel economy, I would call 1mpg statistically insignificant. Maybe you had a tail wind that day.
Agreed. I just reread what the OP said and overlooked that he only drove the car 30 miles and is calculating his MPG improvement without going through the whole tank of fuel. Merely driving on the highway for 30 minutes or missing some red lights will improve your MPG in that time. That's skewing results toward the desired outcome.
My engine is in really good shape, there's very little wear, and no damages at all internally. If your engine is worn or have broken, damaged internals this product won't work.
This throws any claim that it works out the window right away.
You got new oil. New oil is supposed to feel good for the engine. Maybe it's just the oil doing what it's supposed to do and not the miracle additive.
last 2 oil changes for my subie powered vw used liqui moly synthetic (was travelling)
It is claimed u can go 9k between changes
at 6k I checked the oil and it looked as clean as the day it was put in
hth
That's a red flag for me. It means the oil isn't dispersing engine deposits the way it should.
I was just reading about that oil. It seems to be really good. What you said about is the same as others. I'm going to try it the next oil change. When it comes to performance oil and additives I'm extremely skeptical. Over past 12 years I used almost all additives that you can get from parts store They either didn't work or barely. The performance oils worked better then standard oil but when comparing to top shelf oil from stores there isn't any difference or was slightly better. I sent out samples to lab and did a full comparison, comparing the additive packages and life of oil and other important factors. I found Amsoil and Pennsoil platinum and Pennsoil ultra are the best. They last the longest before breaking down and have a really good additive package. Amsoil also provided the best protection when oil is colder. I did the same with oil additives. I would mix the fresh oil with additive, take a sample half way through change and take a sample when draining oil. I send all of them to a lab. I also send out 3 samples with same oil as additive but plain. Then I compared the 6 samples. I can see how the oil reacts and what happens as it ages and I can see if there is any difference with additives. I'm also able to find out what oil addictive companies but in there products.