Lubricant / Capacity Notes

a.

Oil change intervals, natural gas: 800 hours or 12 months, or a maximum 1000 hours by sample analysis; biogas: by sampling in conjunction with manufacturer, 900 hours maximum. Critical parameters for oil analysis available from Perkins

b.

Low compression engines: use gas engine oil with medium ash level. High compression engines: use gas engine oil with low ash (circa 0.5%) and TBN 5-7 mgKoh/g

c.

Catalyst equipped gas engines require oils with sulphated ash limit 0.5%, zinc 0.04% and phosphorous 0.09% by weight

d.

Alternative viscosity recommendations for gas engines below 30°C: SAE 30 where engine start-up problems are probable