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Help! reg gas in prem veical

Need help topic

Hib Halverson

Technical Writer for Internet & Print Media
Joined
Mar 20, 2015
Messages
221
Location
CenCoast CA
V-Series Cadillac(s)?
2016 ATS-V Sedan, 2016 ATS-V Coupe
Any one have experance running reg. gas in a north star motor?

No doubt you're asking the question because you think you can save money by doing that, but you likely cannot or the amount saved will be so small it's not worth it.

If the engine requires premium fuel, you may damage the engine running it on 87-octane gas.

If the engine is recommended to be run on premium fuel, you can use 87-oct but you'll have to live with retarded spark timing, the higher coolant temperature which comes with that and decreased fuel economy because the spark is retarded such that the engine won't knock on 87.

Now, there is one exception to all this and that is if you never accelerate aggressively. If you never, ever use more than, say, 1/3 throttle, then there is probably no issue with using 87-oct fuel.
 

jimmyman1

New Member
Joined
Oct 28, 2016
Messages
2
Location
coarsegold
thank you for that great ansewer to my reg. gas question. very good jimmyman1

:smile:
No doubt you're asking the question because you think you can save money by doing that, but you likely cannot or the amount saved will be so small it's not worth it.

If the engine requires premium fuel, you may damage the engine running it on 87-octane gas.

If the engine is recommended to be run on premium fuel, you can use 87-oct but you'll have to live with retarded spark timing, the higher coolant temperature which comes with that and decreased fuel economy because the spark is retarded such that the engine won't knock on 87.

Now, there is one exception to all this and that is if you never accelerate aggressively. If you never, ever use more than, say, 1/3 throttle, then there is probably no issue with using 87-oct fuel.
 

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