A bus air cooled motor is not the best example. Limited cooling capasity because of air intake issues. The 1500/1600 single port you have pictured is running a remote oil cooler and the factory oil cooler actually HELPS direct the cooling air flow, by removing it, you effectively harm it's cooling capasity causing uneven cooling. The, most likely, tube type oil cooler is less effective than the stock cooler. Less cooling means it is more likely to knock. The easiest way to overcome this is by running a higher octane fuel.
Those engines were also designed to run on leaded gas at 88 ron IIRC. To make them run correctly and for longevity, you need to knock down the static compression ratio down to 7.2-7.5:1.
Your analyses is more akin to compairing apples to lawnmowers. In a more modern FI motor ( as ours do not have knock sensors) better control over your fuel VS a carb, makes this less of an issue.
I use seafoam once every 2 months in the intake. 1 3rd of a can in the intake, the rest in the fuel. It works out well.
I also use water setter in the coolant. It will not, in my experience, help out when stopped with out air flow, but once you are moving, the temps will drop FAST.
For everything else, I just use synthetic oil (15-50 mobil1) in the motor, mobil1 atf in the trans, and synthetic mobil1 in the diff.
Those engines were also designed to run on leaded gas at 88 ron IIRC. To make them run correctly and for longevity, you need to knock down the static compression ratio down to 7.2-7.5:1.
Your analyses is more akin to compairing apples to lawnmowers. In a more modern FI motor ( as ours do not have knock sensors) better control over your fuel VS a carb, makes this less of an issue.
I use seafoam once every 2 months in the intake. 1 3rd of a can in the intake, the rest in the fuel. It works out well.
I also use water setter in the coolant. It will not, in my experience, help out when stopped with out air flow, but once you are moving, the temps will drop FAST.
For everything else, I just use synthetic oil (15-50 mobil1) in the motor, mobil1 atf in the trans, and synthetic mobil1 in the diff.
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