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Oil Drain Plug replace - at oil change....

Fonz54

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Yeah, I wanted the Fumoto too, have it on my F150 Raptor. Nothing specific, I believe I had a $10 coupon at the time, LOL!
I use the Ronin on my Bronco, but I had a Fumoto on my TJ.
 

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swamp2

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Late to the party but there's some very unfair plastics stereotyping here. I thought we were past that. Not all plastics are bad!

In all seriousness one of the worst environmental things (other than of course exposure to incompatible chemicals) is UV in sunlight. It's very hard on a pretty large percentage of plastics. That's obviously not a concern for an oil drain plug. If course good UV performance is mostly a matter of the right basic choice but can be enhanced with additives.

Heat certainly can be a concern and can combine with sone chemicals to become a mutually incompatible environmental condition (say esters OK, 100°C are both fine, but esters at 100 °C is a no-go). That said even run of the mill plastics like nylon can take a lot of thermal cycling just fine.

Polymer pistols, as pointed out prior, are a great example of a very robust "engineered composite plastic". They lost very lonb under high loads, shock loads, high temperatures and a barrage of strong cleaning chemicals and lubricants. Basically these are just glass fiber reinforced nylon. That same combination is used in the underhood automobile environment.

Although, there are reasons to dislike plastic fluid pans (strength/durability), a well designed plastic drain plug absolutely doesn't need to be periodically replaced. One could very well extend it's proper function on a very high mileage vehicle with just one or two o-ring replacements (same routine as a metal plug too...).
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