Re: Fuel

Posted by TxGoat On 2024/6/27 9:45:29

A stuck manifold heat valve could contribute to pinging and lost power.

Shell 87 non-ethanol is an excellent choice.

I overlooked the possibility of excessive carbon buildup, which is not uncommon in older cars, especially if they are not driven regularly on the open road. See below:

*Another thing to consider is that simply by driving the car on an extended trip on the open road you may have cleaned out carbon buildup, thus reducing or eliminating ping*

Short trips around town and extended idling can allow carbon to build up in the cylinders, which can cause pinging under load. Shell is probably a Tier One gasoline, with better quality control and a more complete additive package than some other gasolines, which can help prevent carbon buildup and help remove it if it has occurred.

Older cars can benefit from an occasional open road run of twenty miles or more at speeds around 50 to 55 MPH or more, if appropriate for your particular car. Running at highway speed for a few tens of miles with fresh gasoline and clean oil can help keep the engine running well, and it's good for the tires and drive line units as well as for the battery.