I thought this might be an interesting thread. We all have our preferences for products we like and recommend, whether it's because of technical superiority, positive personal experience, or just brand loyalty, but what about those products you'd never want to use?
For me, the first three I can think of are:
-Any multi-vehicle ATF that claims compatibility with both regular automatic transmissions as well as CVTs. I'm not a hater when it comes to multi-vehicle ATF overall, but these magic fluids that supposedly work with both types of transmissions scare me. Yes I know the companies have tested it and tons of people use it, but in my vehicles or a friend or family members vehicle that I care about, absolutely not.
-Any oil additive that thickens the oil. I do think that there could be some merit to some oil additives, but all that super thick stuff like Lucas or Motor Honey etc is nasty. If you want thicker oil, put thicker oil in the car. If you really think you need thicker oil buying a 5W-40 instead of a 5W-30 is a much safer and likely cheaper choice than buying 5W-30 and putting a quart of Lucas or similar product in there.
-Washer fluid that isn't just washer fluid (such as RainX's green one). Not only do some car companies (Tesla) specifically state not to use stuff like that because it can coat the low washer fluid sensor and mess it up, but even on cars without that sensor, every time I have tried that stuff, it makes for a horrible film that causes glare from oncoming headlights when driving at night after using it. Always use the regular one (around here that's typically the blue generic one).
For me, the first three I can think of are:
-Any multi-vehicle ATF that claims compatibility with both regular automatic transmissions as well as CVTs. I'm not a hater when it comes to multi-vehicle ATF overall, but these magic fluids that supposedly work with both types of transmissions scare me. Yes I know the companies have tested it and tons of people use it, but in my vehicles or a friend or family members vehicle that I care about, absolutely not.
-Any oil additive that thickens the oil. I do think that there could be some merit to some oil additives, but all that super thick stuff like Lucas or Motor Honey etc is nasty. If you want thicker oil, put thicker oil in the car. If you really think you need thicker oil buying a 5W-40 instead of a 5W-30 is a much safer and likely cheaper choice than buying 5W-30 and putting a quart of Lucas or similar product in there.
-Washer fluid that isn't just washer fluid (such as RainX's green one). Not only do some car companies (Tesla) specifically state not to use stuff like that because it can coat the low washer fluid sensor and mess it up, but even on cars without that sensor, every time I have tried that stuff, it makes for a horrible film that causes glare from oncoming headlights when driving at night after using it. Always use the regular one (around here that's typically the blue generic one).
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