Würth Engine Flush & Cleaner and Liqui Moly Engine Flush come from the same group. Würth owns Liqui Moly outright. Put the two safety data sheets side by side and the base is nearly the same: a C10-C13 hydrocarbon solvent at 70-90%, plus a ZDDP anti-wear additive. The gap is small. Both sheets list the […]
Wynn’s Oil System Cleaner (Motor Cleaner): Ingredients, Use & Safety
Wynn’s Oil System Cleaner (sold in some markets as “Motor Cleaner”, 325 ml) is a mild, “drive-in” flush. You add it to the old oil before a change, let the engine idle 10-15 minutes, then drain and swap the filter. It’s no solvent bomb. The cleaning comes mostly from a detergent (a surfactant) plus plain […]
Liqui Moly - About the Brand: Owner, History and Origin
Liqui Moly (100% Würth Group) is a German brand of engine oils, lubricants and car-care chemicals. It’s based in Ulm and has been around since 1957. The name comes from its first product - a liquid oil additive based on molybdenum disulfide (MoS₂). Legally it runs as Liqui Moly GmbH, its own company inside the […]
Ultrasonic Diesel Injector Cleaning: Cost, Effectiveness and When It Won’t Help
Ultrasonic injector cleaning pulls deposits - carbon, varnish, coking - out of injectors that have been taken off the engine and dropped into a ~40 kHz bath. It runs about the equivalent of €25-70 per injector and only earns its keep as the first step of a full service that ends on a flow bench. What […]
Does an Engine Flush Actually Clean, or Just Coat?
Answer: Whether a flush cleans or just coats comes down to one thing: how hard its base solvent dissolves deposits. That is what the kauri-butanol value measures (KB, ASTM D1133). Light aliphatic flushes are gentle because they are weak - KB around 30. An aromatic base sits near KB 105 and cuts varnish roughly three […]
Symptoms of Bad or Clogged Diesel Injectors
Answer capsule: Bad or clogged diesel injectors cause seven telltale symptoms: hard cold starts, black or white exhaust smoke, rough idle and misfire, higher fuel consumption, a check-engine light, a sharp diesel “knock,” and a raw fuel smell. Carbon deposits often respond to a quality PEA cleaner; mechanical injector failure does not and requires reconditioning […]
Will an Engine Flush Cause Leaks? Myths vs Facts
A correctly chosen engine flush will not cause leaks. The modern gentle ones carry lubricant alongside the solvent, so they are safe for seals. Leaks turn up in one situation only: a harsh kerosene product pulls sludge off a seal that had already gone hard and cracked on a high-mileage engine. The flush shows you […]
Engine Oil Coking - Symptoms, Causes and How to Remove It
Engine oil coking is the baked-on hardening of motor oil into carbon sludge and lacquer when it overheats in hot zones like the turbo bearing and piston rings. It is caused by extreme heat, oxidized oil, and missed oil changes. The proven fix is a chemical engine flush run for about 10 minutes on a […]
How to Make an Engine Flush?
You can’t mix a safe, effective engine flush in your garage. Kerosene, acetone, paint thinner - they all thin the oil, go after the seals, and do nothing to hold the loosened muck in suspension. So the sludge you knock off the walls just goes looking for the worst place to land. A ready-made flush, […]
How to choose an engine flush
The best engine flush is not one particular brand. It is a product matched to your engine type (petrol or diesel), its condition, mileage and the character of its chemical base as declared on the SDS. Two things decide together: how strong the base is, and whether the sheet lists a lubricant buffer. A strong […]