Originally Posted By: Ed_Flecko
There are some instances I would agree with you, but my experience with both Japanese and European cars that I've owned makes me very cautiously considering my oil filter. In my experience, many aftermarket parts just do not fit properly and your vehicle leaks, squeaks, groans or otherwise runs like excrement. Conversely, if you use OEM parts, you can be confident that your vehicle will run just as the factory designed it to!
My concern has also been verified by one of my Brother-In-Laws who has managed Napa parts stores as well as both parts departments for Nissan and Ford.
Ed
To put a fine point on it: rubbish. There are only 4 parameters that the aftermarket filter has to get correct in order to "fit right." Thread pitch, gasket diameter, external dimensions, and relief valve pressure. How well and consistently it works once those parameters are met is what really matters, and that depends on what's invisible to you inside the canister.
Its also been documented here that the innards of dealer-purchased Denso filters are different than factory installed Denso filters, whereas we all know quite precisely what the insides of a Fram Ultra look like and what materials are used- and they're very good.
This just isn't an issue for oil filters.
There are some instances I would agree with you, but my experience with both Japanese and European cars that I've owned makes me very cautiously considering my oil filter. In my experience, many aftermarket parts just do not fit properly and your vehicle leaks, squeaks, groans or otherwise runs like excrement. Conversely, if you use OEM parts, you can be confident that your vehicle will run just as the factory designed it to!
My concern has also been verified by one of my Brother-In-Laws who has managed Napa parts stores as well as both parts departments for Nissan and Ford.
Ed
To put a fine point on it: rubbish. There are only 4 parameters that the aftermarket filter has to get correct in order to "fit right." Thread pitch, gasket diameter, external dimensions, and relief valve pressure. How well and consistently it works once those parameters are met is what really matters, and that depends on what's invisible to you inside the canister.
Its also been documented here that the innards of dealer-purchased Denso filters are different than factory installed Denso filters, whereas we all know quite precisely what the insides of a Fram Ultra look like and what materials are used- and they're very good.
This just isn't an issue for oil filters.