HomeBlogBIZOL - Innovation in motor oils ENGINE COMPRESSION – HOW TO IMPROVE IT?


Better engine compression thanks to an oil system clean

Use engine cleaner before changing oil

Deposits are hardly avoidable by-products of fuel combustion in the engine. In addition to generally undesirable effects such as clogged oil channels and reduced protective oil properties, deposits on the surfaces of the intake or exhaust valves or on the piston rings can even reduce engine compression. Clean piston rings mean better compression and more efficient power transmission. This is usually remedied by engine cleaners such as BIZOL Pro Oil System Clean+ p91, which dissolves coking directly before the oil change. But how do compression wastes occur and what are their effects?

Engine compression waste due to oil carbon on the piston ring

Pistons are often equipped with up to three piston rings, and each one has a different function. One of the piston rings is responsible for compression. The so-called compression ring seals the combustion chamber from the crankcase and thus contributes significantly to efficient power transmission. In order to ensure the full function of the piston rings, they must not be restricted in their horizontal movement or contact pressure. However, coking, especially by oil carbon, can hinder or jam the mobility of the compression rings. This can lead to a lower contact pressure of the rings and a lower engine compression. Less engine power is then the result. It is therefore important to loosen the oil carbon on the piston rings with the aid of special cleaning additives before changing the oil.

Rinse out the oil carbon with engine cleaner

Products such as BIZOL Diesel System Clean+ d60 or BIZOL Gasoline System Clean+ g80 can dissolve the impurities on the injection nozzles and valve seats, but they have little effect on the cleaning of the piston rings or oil channels. An engine oil sludge flushing or an engine cleaner like BIZOL Pro Oil System Clean+ p91, on the other hand, is an additive especially developed for the maintenance of the entire oil system and for decoking the piston rings.

More performance with oil cleaner

The BIZOL Pro Oil System Clean+ p91 is simply added to the oil before the oil change. Its highly effective cleaning agents dissolve soot, varnish and deposits in the oil channels and especially on the piston rings. The loosened deposits are then immediately rinsed out with the upcoming oil change. The restored mobility of the compression rings results in improved contact pressure, compression pressure and better engine performance.
One 500 ml can works efficiently up to 5L of engine oil. Not suitable for motorcycles with wet clutches. Compatible with all commercially available engine oils. Simply proceed as follows:


1. raise engine to operating temperature

2. add contents to the used engine oil before changing the oil

3. run the engine at idle for approx. 10 to 15 minutes (don´t drive!)

4. change oil and filter

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