Question 1

What is the oil capacity of the R18A4 engine?

Accepted Answer

The R18A4 engine requires 3.7 quarts of oil with filter. Recommended viscosity: 5W-20.

Question 2

What oil viscosity does the R18A4 engine use?

Accepted Answer

The R18A4 engine uses 5W-20 engine oil as specified by the manufacturer.

Question 3

What is the coolant capacity of the R18A4 engine?

Accepted Answer

The R18A4 engine cooling system holds 5.6 quarts of coolant (full system capacity).

Oil Capacity	Viscosity	Coolant Capacity
3.7 qt	5W-20	5.6 qt
3.9 qt	5W-20	5.6 qt

R18A4 Oil Capacity

R18A4 – Oil & Coolant Specifications