My '91 Geo Metro burns a LOT of oil. I have discussed this with several people, who have posed a few different solutions. Here they are:
<br/> 1) Use a heavier oil. I traditionally used 10w-30 for better gas mileage and better starts in cold Wisconsin weather, but some have said that switching to 20w-50 will help slow the flow of oil past the seals, thus burning less.
<br/> 2) Replacing the seals may seem like an obvious solution, but the Metro's 1.0L I3 engine is made entirely of aluminum and prone to warping. I drive it very gently, but the last owner was not so careful - I suspect that replacing the seals in an already warped engine will not help much.
<br/> 3) Crankcase additives promise to eliminate oil loss and smoke, some even say they will do it permanently. Do any actually work?
<br/> What are your thoughts?