I have NO IDEA how I've made such a bone-headed move, but I've been putting Amsoil 0w-30 Signature Series Synthetic oil in my Dakota for the past 25,000 miles. I've done three oil changes in that period.

I ordered 5w-30 TODAY and am having it delivered by this weekend. What I'm curious about is if I've (potentially) done any damage.

I don't drive too crazy, but I do a lot of mountain and off-road driving. I check my fluid levels frequently and (knock on wood) have not noticed any leaks or issues with the engine.

Hoping I've dodged a bullet? (No pun intended...)

 

If it hasnt been too cold out you are prob be ok. I ran 10w-30 in my 5.2

 

It hasn't. It's been crazy warm here in Colorado.

 

Won't hurt a thing especially since cold weather is upon us. Switch it back to 5W30 in the Spring if you like.

 

A thinner oil would actually be alright in the winter. You'll be fine. I highly doubt any damage was done.

 

Yeah I was thinking backwards. This cold has really takin over my head..

 

I'm sure I'll get flamed, but here goes.

Anything from 0w20 to 10w40 will run in your truck fine.

 

I run 5w30 in my 2000 Dak 4.7 all year round, and i am here in Alaska, last week it was 52 below and it ran just fine .. mind you i do plug my Dak in any time that it gets to 10 below or colder!!!

 

well i use 5w-30 synthetic in the fall - winter and 10w-30 synthetic threw spring -summer and my truck runs fine.

 

I'm still using Quaker State straight 40 W with Lucas additive. The only reason for using a lower number multi grade is for cold weather starting. If it gets THAT cold, I don't want to go outside anyway. Throw another log on the fire.