Was it a quart to top off, or was it a complete oil change? If just a quart or so, I would say no problem. If it's a full 5+ quarts, it supposedly may damage your catalytic converter, or at least that's what I heard long ago.
Jeepless for now, probably not for long
98 Grand Cherokee Limited 5.9
98 Grand Cherokee Laredo
Its a pretty thick cold weight, but not by much. You don't need to do anything drastic though, I run diesel oil all the time (Rotella T6 full synthetic 5w40) because it stops some ticking noises, has lots of detergents, and works well. It's basically the same as gasoline oil plus more detergents for all the soot created by diesel.
Oil pressure SENDER leaked, had to emergency fill with diesel oil 15W-40 APICJ-4/SM
Am I good to go or do I flush and fill with reg 10W30??
most what i read, its ok to leave in for now.. change at 3k ????
1) See that "SM"? That's a gasoline engine spec.
2) The primary difference between a Diesel-rated oil and a gasoline-rated oil is the extra antiscuff additives and acid neutralizers (Diesels tend to form sulphuric acid in the oil, and still don't run roller valvetrains.)
The idea that a Diesel-spec oil will "poison" your catalyst bed is true - if you have excessive leakage past the oil control rings, or leaking valve guide seals. If you don't lose oil, she'll be right.
(The "poison" for the catalyst is the organometallic antiscuff additives - which is why the newer "Energy Saving" oils aren't really, they're just reduced-om additive oils to reduce catalyst poisoning. However, those oils are intended to be used ONLY with roller-tappet engines, and you will wipe out the cam in a flat-tappet engine, sooner or later. If you see "Energy Saving" on the front, flip it over and look at the back and you will likely NOT see a "C" service rating, which is a Diesel service rating.)
And, using a Diesel-spec oil in the short term in a gasoline engine should cause no trouble - tribological specs and additive packages for Diesels usually far exceed those for gasoline engines anyhow.
The theory that the higher ZDDP found in HDEO is just a theory, and has not been proven to damage catalytic converters. If you really want to know, head over to Bob is the Oil Guy. You don't need the extra ZDDP found in HDEO since your engine doesn't have flat tappets, but it certainly isn't going to hurt anything -- and some people run HDEO because they feel that the extra ZDDP gives them peace of mind. Imagine how much poisoning has already occurred to the catalyst through normal driving.