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Check the oil level on your new Mustangs ASAP

Kevi

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For street use a quart low isn't hurting anything. If you are doing laps at laguna seca, maybe. It really doesn't matter what your oil level is as long as the pickup tube stays submerged, and that's near the very bottom of the pan.

Running too light of an oil will cause thermal breakdown and main bearing failure. Like in all the GM trucks running 0-16.

GM had to up the recommended weight to 0-40 to keep the rods from welding to the crank.
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robvas

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Running too light of an oil will cause thermal breakdown and main bearing failure. Like in all the GM trucks running 0-16.

GM had to up the recommended weight to 0-40 to keep the rods from welding to the crank.
0W-20, that 16 weight stuff is Honda/Toyota territory
 

Cz_Ziemniak

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Directly from a Tribologist: 0W-20 is " the beginning of the microweight range" for motor oils

"0W20 was for fuel economy. Cheap, fast, good…. Yadda yadda. A German engineering solution to,an American problem. Where have we seen that fail before?"

"While modern machining tolerances do allow for 0W8, it is hard for me to say that that is a solution that is valid for all driving conditions. Anything below 5W30 is a fuel economy play. Imagine Fast, Cheap, Good, but in reality it's Fast, Great fuel economy, and Durability. You get two. Most modern vehicles are building for fast and great fuel economy. Durability is sacrificed to planned obsolescence."

This person I 100% trust with this info. They've been in the industry for a decent amount and 100% know what they are talking about.
 

robvas

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The manufacturers have no interest in making a long-lasting engine any more.

Plastic parts, crappy DoD parts, DI systems that clog up your engine, ultra thin oil and yearly oil changes, lifetime fills of the transmission...
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