it depends on which state you live in. if its the upper north it's a thicker oil.
The oil weight needed for a 1985 Camaro Z28 will depend on the type of driving and the outside temperature. If the car is to be driven in summer, the weight of the oil should be 10-40. In winter, switch to a 10-30 or 5-30. If the car is a show car for racing, 50 weight oil can be used in the summer.
5W30 weight in the winter months and 10W30 in the hot months.
5w20 winter, 5w30 summer.
As a snowblower is used in the winter use 10w30 weight synthetic oil and change the oil once each year.
Whatever weight and type the manufacturer recommends.
The operator's manual for a 3020 should state which weights of oil should be used in specific temperatures. Generally a 30# oil should be used in the summer and a 10# oil in the winter. A Multi-weight oil such as 15W-40 can also be used in all seasons.
Use 10w30 in the Winter and 20w50 in the Summer.
It is the weight of the multi-vicosity oil. The 10 is the weight of the oil when cold. The W stands for Winter. The 40 is the weight of the oil when it gets hot.
The type of oil should be imprinted on the dipstick of the motor. However, combination weight oils are bad for smaller engines. Try straight 30 weight.
Read your owners manual to see what type of oil weight you need. By weight I mean 10w30, 5w30 etc. Your manual should also tell you what type of filter to buy too.
A 1995 Escort wagon takes either 10-30 or 10-40 weight oil. The lower weight oil should be used in the winter to prevent the oil from gumming up the engine.
The manufacturer recommended 10W-30 weight oil in the 1979 Chevrolet Corvette. A heavier weight oil can be used in and older engine.