Smoke every time I start

[blue2000s]

Originally Posted by Lil bastard

That is an 'Old Wives' Tale! There is no greater propensity for a Boxer engine to smoke on startup than any other IC motor.

As proof, all you need to do is look at Subaru's boxer-4 and flat-6 engines, they do not smoke.

If a horizontally opposed motor smokes on startup, there's an issue with rings, valves or guides, or in the case of the Boxster, the AOS.

Subaru engines do puff on startup every once in a while too. Now the hydrolock statement, that's unrealistic.

[d18mike]

My wife's Mercedes A/O failed and the mechanic said it has a 90% failure rate between 70-95K on her particular car.

Is there an approximate mileage range on the Boxster where i should consider changing these on a preemptive basis? Thanks.

[Samson]

Back when I first had my car, it would smoke for a second on the first start if it sat for several days or more. It would puff out a decent size cloud if it sat for more than a week. This was with 0w40 M1. I switched to a 5w40 (for several reasons) and the smoke is gone, regardless of time between starts.