# Harro

**URL:** <https://forums.speedlife.net/t/harro/129925>\
**Category:** SON240sx Automotive\
**Created:** [November 29, 2009, 1:40pm UTC](https://forums.speedlife.net/t/harro/129925 "2009-11-29T13:40:54Z")\
**Posts on this page:** 1\
**Showing post:** 22

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**Author:** ![prodigy](https://avatars.discourse-cdn.com/v4/letter/p/8491ac/32.png) [@prodigy](https://forums.speedlife.net/u/prodigy)\
**Post date:** [November 30, 2009, 11:26am UTC](https://forums.speedlife.net/t/harro/129925/22 "2009-11-30T11:26:21Z")

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> [@another rental car question](https://forums.speedlife.net/t/another-rental-car-question/25067/8):
>
> what 2 stroke oil u using?

Premix is only used when the factory OMP (Oil Metering Pump) is blocked off, or in extremely high-revving motors (eg. Full Bridgeport, Peripheral Port, things greater than 9k RPM) where the OMP can’t lubricate properly anymore.

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