1968 Volume 30 Issue 1 Pages 2-4,12
The test of the declination of oil was carried out and the following results were obtained, in the transportation of timbers with two fork lift trucks, of which one had diesel engine and the other a LPG engine.
1. In both engines, the engine oils needed not be exchanged even after operating the engines for 300hrs.
2. The declinaton of the engine oils was less in the LPG engine than in the diesel engine.
3. The C oil (one of trial manufacture) was recognized to be most suitable for the LPG engine.