This “tip” came to me from a very experienced, completely competent, marvelous small engine mechanic.

Small engine application – 1 table spoon per engine oil change. Most oil today has zinc processed out of it. But, zinc is a really good oil additive that helps lubricate an engine…especially helpful with small engines to extend their life.

Vehicle application – Lucas Oil TB Zinc Plus is a zinc additive for engine oil. Its designed for engines with no catalytic converter in the exhaust. This product is also used as an engine “break-in” additive for newly built engines. For non-race, vehicle applications, one bottle will usually treat two oil changes. Some race-engine applications require the entire bottle. Classic cars (depending on oil capacity) require approximately 2,100 PPM (Parts Per Million) zinc in the oil.

Note #1: The is meant for 4 stroke crank cases. In a 2 stroke, you don’t want any non-combustibles in the mixture as it will gum up everything, and likely damage the motor.
Note #2: diesel oil should have the higher zinc content that is required, such as Shell Rotella 15w-40. You can still use this Lucas product, just don’t over do it on quantity.

Note #3: It does not thicken the oil.

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