CORRELATION OF THE PETTER AVI AND CATERPILLAR IA ENGINES Available to Purchase

The Petter AV1 single‐cylinder 4‐stroke compression ignition engine is frequently used by oil companies and additive manufacturers for screening tests for additive lubricating oils because it can obviate the long and expensive Caterpillar procedure. The oil tests on Caterpillar engines take from 3 to 4 weeks and spare parts, which require dollars, are costly. The Petter AV1 engine test, which has been modified from the standard unit to make it suitable for this work and to more closely simulate the conditions to which the oil is exposed in the Caterpillar engine, takes 120 hours. The modified test is the I.P. AT/4, as modified by the Engine Tests of Lubricants Panel of the Institute of Petroleum.