Mazda 626 1989 Workshop Manual page 338

N um ber 013/96
WARM ENGINE - WARM / HOT AMBIENT TEMPERATURES
* Recommend that the customer try to identify a source of fresh, good quality gasoline. A station which receiver
frequent shipments of fuel will likely be a source of fresh, good quality gasoline.
• Using such gasoline may be more appropriate for these ambient temperatures.
COLD ENGINE - COLD AMBIENT TEMPERATURES
using a higher than recommended octane to switch to the recommendations in the owners
• Advise customer's
manual.
• Do not advise using a higher octane than recommended for that engine. Premium octane grade unleaded gas­
oline does not provide better fuel economy or performance than regular octane grade gasoline. Only advise
using a higher octane grade gasoline to avoid potentially damaging "spark knock" or "ping." Recommend this
octane only after diagnostic procedures are ineffective.
• Advise customers using the recommended octane grade unleaded gasoiine to try another brand.
• If customers are using a gasoline containing an oxygenate, advise them to try another brand of oxygenated
gasoline. If possible, advise customers in this category to try a gasoline which is not oxygenated.
NOTE: The oxygenate type should be posted on the pumps.
GENERAL INFORMATION
• No fuel additives will resolve this concem(s).
• Always use a gasoiine with a "In-tank System Deposit Control" detergent that helps maintain proper operation
of fuel injectors and keeps valves clean.
• This information may be used on any model year vehicles exhibiting these concerns.
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Date Issued: 05/24/96
Revised: