clean EGR= crazy mpg ('02 Insight)

[MPGomatic]

Excellent photos!

Cleaning Slambo's EGR maze (at 125K or thereabouts) made a considerable difference, but nowhere near as impressive as your Insight jump. Holy cow that's huge.

The trick now is to keep those passages clean. I'm throwing a healthy shot of Marvel Mystery Oil into every tank with the hope that it will help.

[maxc]

Small amount of steam in the egr passage condensed from the exhaust gasses would have the auto techs working on other things...

[Stacygifford]

Originally Posted by maxc

Small amount of steam in the egr passage condensed from the exhaust gasses would have the auto techs working on other things...

Maybe I am lost. Lol

please elaborate

[user removed]

Be carefulwith additives. The K&N air filter oil when overapplied wiped out the oxygen sensor on my Insight at 35k miles, no warranty. I didn't install the K&N, done by the previous owner .

regards
Mech

[Stacygifford]

I will keep that in mind!

I love k&n filters, but over oiling them has been known to cause problems.

For example, the MAF sensors on gm products are especially sensitive to over oiling.