I have put oil add into 3 of my cars, the 300D, 240D n F150

The best result is the 240D, more power going uphill and flat top speed.
Quieter engine. Felt like it had changed oil again.

The F 150 used to knock little bit when first fires up. Is a Ford inherent curse, not enuf oil to crank.
The knock is gone when first fire up now, easier revving. Being so heavy is hard to tell any noticeable power gain.

The 300 D is quieter, but not much noticeable gain. This engine has only 80ish HP, is way under power for this long chassis.
Maybe the compression improved, I restart after eng had been warmed, as I was in a hurry, didn't bother to wait for glow plug to heat up. It has a sep switch to turn on GP. This is a custom job.
It happened when I drove down town go away fro 1/2 hr , restart again and she fires right up.

Whereas my 240D and previous dsl needs GP to heat or or else can crank for mins and no firing.

There was a guy here had demonstrate his car by empty out the oil n drove 30 km, it didn't fried either

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