Comments by "IKhan" (@7477238) on "Will Thinner Oils Damage Your Engine?" video.

  1. The C8 is too new to know if they are reliable or not. As for 0W20 motors not lasting we have about 10 GMC Sierras in our work fleet with mileage from 80k to over 160k. Those Ecotec 3 V8 motors use 0W20 synthetic and the oil is changed every 8k miles. The motors run smooth and quiet despite being driven hard and idled for long periods of time (which means they have higher miles than what the odo shows). If the motor was designed for the thinner oils it's fine. It's the motors where the manufacturers suddenly change over for the sake of fuel economy is where the problem lies despite there not being changes to the motor.
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  2. What about manufacturers who have suddenly changed from say 5W30 to 0W20 even though no changes have been made to the engines. For example Nissan/Infiniti has been making the VQ37 HR motors for over a decade. Up until about 2016 they used 5W30 synthetic but now if you take your 2016 to the dealership they throw in 0W20. When you look at the tolerances and specs of a 2011 VQ37 and a 2019 VQ37 there are no differences so wouldn't the drop in viscosity in those cases be bad? Toyota is doing the same stuff for their 3.5 V6 which other than it now having both PFI and DFI there were no changes made to the motor but again, they specify 0W20 now.
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  3. Why do people overthink this? Do what the manual recommends simple as that. They will even show a chart for what weight to use based on temp and operating conditions. IF you wish to change the oil a bit more often than the recommended intervals that's fine and since oil/filters are cheap it's good insurance the motor will run for a long time. Our 2011 Camry V6 has 233k miles and gets whichever 0W20 is on sale at Wal Mart and an OEM Toyota filter every 5k and it runs silky smooth without oil burning or funny noises. Same with our Mercedes which gets the recommended 0W40 every 7.5k and OEM filter and it runs tip top. Oil weight matters to an extent but it's the additives and of course the timeliness of changing the oil that really matter. That whole thicker is better argument ended in the 90s.
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