Volvo 1990 740 Model
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Remove snow tires when threat of snow or ice has ended.
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Note that roof racks, ski racks, etc., increase air resistance and thereby fuel consumption.
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Turbo: try to keep the boost pressure gauge in the black range.
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Utilize overdrive at speeds above approx. 45 mph (70 km/h)
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Avoid using automatic transmission kick-down feature unless necessary.
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On cars with manual transmission, utilize the shift indicator light (S.I.L.). See "Instruments".
Other factors which decrease gas mileage are:
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Worn or dirty spark plugs
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Incorrect spark plug gap
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Dirty air filter
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Incorrect valve clearance
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Dirty engine oil and clogged oil filter
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Dragging brakes
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Incorrect front end alignment
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Low tire pressure
Some of the above mentioned items and others are checked at the standard Maintenance Service
intervals.
Carbon deposit build-up
Your engine has been designed for peak performance and smooth operation. The fuel you use plays a
major role on how your engine will function. With the many variations of fuel available, it is important
that detergent blend fuels be used to reduce the risk of intake valve carbon deposit build-up and clogged
fuel injectors. Both of these conditions will rob your engine of the very thing it has been designed for,
performance and smooth operation.
Note:
Volvo does not recommend the use of fuel additives as they can adversely affect engine
performance.
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