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Old 10-12-2014, 03:07 PM   #1 (permalink)
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Weak engine compression and FE

I have a 1999 civic lx manual with all stock internals and now 124k miles. When I bought the car a few months ago it had low compression.

Original cylinders readings (note supposed to be 180psi from factory)

1 150
2 135
3 135
4 150

Following this I added this product to the oil upon suggestion from a friend



My subsequent readings have been 150-155 across all cylinders. I've used this product for 3k miles now with consistent results in compression. My question is how much relative FE am I missing out on now and is this is a long-term solution?

PS i'm getting my Scangauge in the mail today but so far my best tank has been 40.5 mpg just being really light on the gas at 60mph.

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Old 10-28-2014, 03:15 PM   #2 (permalink)
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Worthy of a bump

I think a healthy Honda engine shouldn't be lower than maybe 175-185, and a friend of mine has an S2000 that's above 230 on all cylinders (low miles). I don't know about the FE losses, but 40mpg still sounds pretty reasonable without ecomods or driving techniques.

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