Good day everyone I haven’t been on here for a while but I have a 1982 dodge D1 50 with a slant six, I’ve owned it since August 2022 never changed it oil because I haven’t driven it much but maybe I should’ve it’s pretty black and now I bought oil in an oil filter, I K&N Gold oil filter and 10W-30 Quaker State oil. For the first time the other day, it smoked a little blue when I pinned it. What’s your guys thoughts on the oil and filter? I’ve heard it’s better to use 10W-40, but I couldn’t find any in the store at the time.

Oil filter is probably fine, as long as it has the anti-drainback valve in it.

You should be running 5W-30 oil, no additives, and get the cheapest you can find with the API sunburst logo. Running heavier/thicker oil does nothing good for your engine and can actually harm it because it takes long to push the oil through all the oil passages when the engine is cold. You don't need any zinc additives, either.

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Casually looking for a Clifford hyperpak intake for cheap.

Heavy oil in a slant six is a bad idea especially in cold climate. With a factory oil pump it is less of a problem, but the engines have been known to strip the gear on the camshaft. Just remember any modern oil is much better than the oil that was spec'd when the engine was designed in the late 50's.

10W-40 is just about never the right answer. 10W-30 is a fine choice, probably optimal. 5W-30 is fine, too, especially if you live in a colder area, if the engine is in tight enough condition to hold onto it; a high-miles unit generally won't be, and it sounds like yours isn't. Reed's right; don't waste effort-money-time on pour-in additives or on fretting too much about your oil selection—the worst oil you can buy now is better than the best you could buy when the truck was new.

K&N's main product is fraudulent hype of overpriced/underperforming "performance" "filters". If you want to put money into super-premium oil filtration, it's a Fleetguard LF-3487. That is a very expensive filter unless you search (or luck) your way into a case-lot bargain or something. The less-pricy Fleetguard LF-551A or LF-3313 are still several large notches better than the cost-prioritized consumer-oriented brands. I have no recent data on whether Wix filters are still a solid bet; they were my go-to widely-available brand for years, but that was several equity-company brand-owners ago, when the filters were made in countries without China's reputation.

Blue smoke doesn't mean the oil's wrong, it means the engine's worn. The exact nature of the wear, and what to do about it, depends on what you mean by "pinned it".

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

For teaching lubrication in classes, I scavenge old filters from my local Jiffy Lube. The students then cut the filters open to see what kind of contamination they can detect on the elements. My observations are that the cheaper auto parts store brands are really flimsy, possibly would plug and go into by-pass mode. Wix seem to be pretty good construction, with more filtering area. The best quality that I have seen are routinely the dealership OEM (Toyota, Honda, etc.)
My 2 cents.

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"Louise", a 1976 Dart Custom project, (now sadly reverted to being just an "organ donor" to our other project Darts.)