Out of curiosity, I have been experimenting with adding these two additives
to my gas and oil respectively.  I really wasn't expecting much, but I was
very surprised:

The "Marvel Mystery Oil" (available at Longs and NAPA) immediately increased
my avg highway mileage to 19mpg from 15mpg  -- and I have experienced a
noticeable increase in power.

The CD-2 Oil Detergent, I believe, has helped to quiet some low level
"tapping/clacking" in the engine -- and overall the engine is runs
noticeably  smoother with the CD-2 added.

I was surprised how well these seemed to work, and I mentioned my results to
the guy at NAPA parts and he nodded his head knowingly and said "yeah, snake
oil that actually WORKS!"  (That was my reaction too.)  He said that he
sells a lot of the Marvel Mystery Oil in partcicular, and has a lot of
customers who swear by it!

Anyone use these and had similar experiences?
Any problems with using additives in vanagons?
Any other additives that people have found helpful?

Thanks.

Tony

'91 Syncro Westy
('teepee')

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