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Old 02-04-2013, 03:43 PM   #16 (permalink)
wmjinman
Master EcoModder
 
Join Date: Oct 2012
Location: Carson City, Nevada
Posts: 612

Jimmy - '00 GMC Jimmy SLT
90 day: 21.18 mpg (US)

The White Gnat - '99 Suzuki Swift
Team Suzuki
90 day: 51.87 mpg (US)
Thanks: 240
Thanked 109 Times in 87 Posts
I don't know if it had a sludge problem, as it already had 70,000 +/- miles on it when I got it. But the mechanic said there was no sludge under the valve cover or anything like that. The oil was black when I got it, however, so I did an oil change soon.

I had been thinking maybe this engine had higher loads, since it is small and presumably needs to "work harder". I really like my 5000 mile oil change interval, because it's so easy to keep track on the odometer "without thinking", but maybe I need to shorten it up to 3000 or something.

Maybe when and if I ever get it running again, I'll pay attention to how it looks at 3000. And with a newly reconditioned head on it, maybe it'll stay cleaner longer, too.
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