Paul.McLean.US
New member
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- New York
I apologize if my question has already been answered.... 1000's of posts are hard to read thru... I have a 1957 M55 Diamond T dump truck. I've had it now for several months. What is the recommended fuel octane? I read thru the manuals and it seems like 85 octane, but they don't make that around here any more. I tried 91 octane non ethanol but was worried of engine damage so I went to 87 octane 10%ethonal... After a few rain storms it now runs like crap and barely starts. I am thinking water is the problem. Does anyone see a problem with running 91 octane non ethanol?
And if anyone can lead me to a set of sparkplugs and gaskets, I am thinking maybe I need to change them.... No clue the condition or last time they were replaced... possibly 1991 when the engine was overhauled.
![1204201021a-crop.jpg 1204201021a-crop.jpg](https://www.steelsoldiers.com/data/attachments/577/577273-5440864f13b5109750bb8ed5120eb61a.jpg)
And if anyone can lead me to a set of sparkplugs and gaskets, I am thinking maybe I need to change them.... No clue the condition or last time they were replaced... possibly 1991 when the engine was overhauled.
![1204201021a-crop.jpg 1204201021a-crop.jpg](https://www.steelsoldiers.com/data/attachments/577/577273-5440864f13b5109750bb8ed5120eb61a.jpg)