Those plastic friction rings typically sit between the metal of the strut and the metal of the spring. This shims the spring off of the metal spring perch, thus preventing from wear and tear on the spring or strut body.
In the case of MSS springs, their design suggests you should have four. One...
Flex fuel works on a concept called "scaling timing."
Timing is when the spark plug fires before top dead center (BTDC) of the compression stroke. If, for example, you are "advancing timing" by 9 degrees, it means that the spark plug fires 9 degrees of crank rotation BTDC. The more timing...
1. If you have a flex tune, going up to 85% ethanol concentration will be fine without re-tune. Not totally optimal, but fine.
2. Gasoline has lubricating properties not found in e85. Occasionally putting through a blended tank, or a tank full of gasoline, could help keep certain seals in good...
What do you intend to do with the car?
I, personally, spend the vast majority of my time on the street. Out of all the tires I've tried on the Supra (and another car I have at ~525 WHP), I've loved Toyo R888R and Continental ExtremeContact Sport the most.
I also really like my Mickey Thompson...
I admit it is difficult for me to explain the cooling loss. My best theory is that the coolant level was already juuuuust above the trigger level for the coolant level sensor. Then, a small amount of natural-and-expected loss plus loss from bonding to the surface metals pushed it over the edge...
Your manual states API SN or ACEA C5 as official oil specs for your engine.
Both oils contain those certifications. The 6600 additionally contains BMW-specific certs, and you have a BMW motor.
This is fair skepticism and I appreciate it. The failure mode may not have been the same, but my head is in a place where I'm just baseline suspicious of all B58TU oil pumps.
Trying to imagine what happened: It's also possible that some of the polymer pump supply bled into the next model...