Dear Scotty,
My brother has my old Mercedes CLS 320d diesel from 2006; great car. But what additives do you think would make it run better bearing in mind it is a diesel engine. The engine has been remapped from 224 brake horsepower to approximately 275 brake horsepower and also an increasing torque. The car is done 140 thousand miles now not much for a diesel engine from Mercedes. {black}:idontknow:
After adding an additive from your videos it seems to run the engine at high revs maybe on a diesel 1500 rpm to clean the crap out the engine please advise? Thank you very much.
You have mentioned various additives but they are for petrol engines.
it's a fantastic engine.
How would it will improve the performance, the longevity and general health of the engine but also the automatic transmission.
I watch quite a number of your videos seriously impressed. I love your straightness and honesty and obviously excellent sorting out problems which franchised dealers do not sort out. Do not change your character.
A friend of mine stated, don't listen to the manufacturers recommendations. Change the diesel more frequently especially when the engine gets older what are your thoughts please? How frequently must be diesel be changed on his car.
Thank you very much indeed.
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Alastair
Ok, first, understand that almost everything you hear on this topic is anecdotal. No one can offer you a definitive answer, and what I have to say is my opinion only:
1) Newer Mercedes diesels (circa 2000 and later) are not the same as the old ones from the 70’s and 80’s that were practically bombproof. The newer ones are much fussier.
2) Diesel in Europe is generally higher quality and has higher cetane ratings than most North American stuff, or so they say.
3) Therefore, I would run a fuel additive with every fill up. Which one? Nobody really knows. I have had a good impression from Hot Shot’s Secret, Howe’s, and Power Service Diesel Kleen. But others are good too.
4) I would not use an oil additive, however, I would check the oil frequently and change it every 3-5000 miles
PS: we generally don’t encourage including your personal email on a public forum. Nothing good is likely to come of it.