It seeps around the piston oil tube and down into the little moat inside the
piston where it drains out through the piston vacuum chamber holes at the
rear bottom corner of the piston. From there it enters the piston as
"top-cylinder lubricant" which extends engine life. SUs are awesome! Top
them up weekly but fust to the top of the piston tube. If there's oil on
the underside of your bonnet, you're filling them too full.
Shawn Tobin
Midget MK III 5spd (every day)
Jaguar Series 3 VDP (wife's car)
no other cars
Dallas Texas USA
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