Compression ratio is the volume of space in the combustion chamber from largest to smallest capacity. In internal and external combustion engines, compression is defined as the piston’s movement to squeeze the fuel/air mixture in the cylinder.
Peak compression is a must
Most technicians know that peak compression in an engine is necessary to allow an engine to extract the most energy from the fuel/air mixture. An engine’s proper compression ratio allows the right amount of oxygen and fuel molecules into a reduced space (the cylinder) along with heat caused by compression. A given gasoline engine’s compression ratio example can be approximately 9:1, which means 9 units of air into the space of 1 unit. All of these elements working together result in optimum fuel/air mixing to ensure the maximum release of available energy from the fuel source. So, an engine’s proper compression ratio is a good thing.
BG Sales Reps know it’s inevitable that every engine will experience a loss of compression. Loss of compression means a cylinder can lose some of its potential fuel/air mixture. Compression loss usually occurs due to improper piston ring sealing (or more rarely head gasket, valve sealing or piston wear).
This loss in compression is not solely related to driven mileage, but many factors related to daily operation. Performance problems related to compression loss have been recorded as early as 30,000 miles. Loss of compression results in decreased performance, reduced fuel economy, higher emissions, possible engine sludge and a greater degree of driveability problems.
Maintain peak compression
Lab testing has shown benefits with restored performance, reduced emissions and regained MPG from just one oil change using BG EPR®!