GT3 cold start and white smoke
09-11-2017, 08:48 PM
#16
Race Director
Its like brakes squeaking. I have learned to embrace that it just conveys that you are in a race car. I have PCCBs and after about a month of washing it it starts squeaking/shrieking - that is how I know it is time for a bath 
09-11-2017, 09:04 PM
#17
Rennlist Member
09-11-2017, 09:10 PM
#18
Rennlist Member
At BMW autocross yesterday and started the car up to get it out of my trailer. Big white cloud filling the trailer. Hey WTF? some exclaimed. No problem, car just elected the next pope.
09-11-2017, 11:59 PM
#19
1st Gear
Join Date: Jan 2015
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Don't post much here but some thoughts. GT3 is dry sump with very low center of gravity and shallow oil collection return (unlike Subaru wet sump). Try this, let car idle down 30-60 sec before shut down. Oil runs to sump and clears bottom of cylinders. Want better, change to motul 5w-40. Mobile 1 0w-40 is water when hot. Running mobile 1 past 3-4K, it gets even thinner. My 2014 now hardly ever smokes on start. Had a buddy try this with 2015 and same results
09-12-2017, 12:24 AM
#20
7th Gear
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Don't post much here but some thoughts. GT3 is dry sump with very low center of gravity and shallow oil collection return (unlike Subaru wet sump). Try this, let car idle down 30-60 sec before shut down. Oil runs to sump and clears bottom of cylinders. Want better, change to motul 5w-40. Mobile 1 0w-40 is water when hot. Running mobile 1 past 3-4K, it gets even thinner. My 2014 now hardly ever smokes on start. Had a buddy try this with 2015 and same results
09-12-2017, 04:38 AM
#22
09-12-2017, 12:57 PM
#23
In general, is the root cause for this due to the pistons being horizontally arranged? When I asked this question, someone had told me it is because oil collects on the bottom wall of the cylinder and gets burned off when you start the car. That might be BS and figure it is in line with this thread to seek clarification.
Mine is a 2015 and does it occasionally. No worries.
Sometimes at start up in the garage the amount of smoke is alarming but still has no smoke on 9/10 of the start up. If it was an issue it would show increased usage which mine doesn't
