Operation Manual

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1979 Volvo 242 244 245
changed. This is very important since the oil rapidly collects impurities during the break in period.
pg. 31 Driving economy
Economical driving does not necessarily mean driving slow
Better driving economy may be obtained by thinking ahead, avoiding rapid starts and stops and
adjusting the speed of your vehicle to immediate traffic conditions. Observe the following rules:
● Bring the engine to normal operating temperature as soon as possible by driving under light load. A
cold engine uses more fuel and is subject to increased wear.
● When possible avoid using the car for driving short distances. This does not allow the engine to reach
normal operating temperature.
● Drive carefully and avoid rapid acceleration and hard braking.
● Do not exceed speed limit.
● Avoid carrying unnecessary items (extra load) in the car.
● Check tire pressure regularly - cold tires.
● Remove snow tires when threat of snow or ice has ended.
● Note that roof racks, ski racks, etc., increase air resistance and thereby gas consumption.
Utilize the transmission to improve fuel economy.
Use correct gear!
● From first to second gear at approx 10 mph (20 km/h)
From second to third gear at approx 20 mph (35 km/h)
From third to fourth gear at approx 30 mph (50 km/h)
● If vehicle is equipped with overdrive, use it at every opportunity (at speeds in excess of 40 mph = 65
km/h).
● Avoid using automatic transmission kick-down feature unless necessary.
Other factors which decrease gas mileage are:
● Worn or dirty spark plugs
● Incorrect spark plug gap
● Dirty air filter
● Incorrect valve clearance
● Incorrect idle speed
● Dirty engine oil and clogged oil filter
● Dragging brakes
● Incorrect front end alignment
● Low tire pressure
The above mentioned items and others are checked at the standard 7,500 mile (12,500 km) Maintenance
Service intervals.
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