Hi Scotty!
I appreciate your videos!! I just bought a fantastic 2004 Mercury Grand Marquis LS with 90,000 miles. Should I use synthetic or regular oil?
THANKS!
-Matt
@matt-haislip
you need to use the original oem oil. head over to your car dealer and let them help you get the correct engine oil and the correct transmission oil. dont use anything else. if you cant go check your user manual
@reddevil1321 Thanks for the info!
@matt-haislip
you have to use original, even if previous owner used the wrong oil. it has to be the same number like 0w-00 etc, same viscocity. scotty has a video and teaches you that wear starts when you first turn on the engine, it takes a few minutes for the oil to reach the pistons and circulate to do its job, you cant change that, if you get thicker oil you will delay the oil from reaching the pistons when you take off and drive. this can damage your engine over time, thicker oil makes more friction and that will mess up your camshat, if that fails the whole engine needs to be replaced.
The owners manual shows a bottle of synthetic oil (5W 20) in their recommendation. The owner seems to have used synthetic as well. I guess I'll use that! Thanks!
@matt-haislip
you need to get it from the dealership, if you get other cheap brands from stores it will not be the same quality. have your dealer give you 5w-20 and double make sure the bottles are unopened, you can not use opened oil bottles since they get corroded and are not good anymore, you can only used brand new oil.
I would just stick with regular oil and good change schedule
Try and find out what the previous owner used and stick with it.
If you can not find out, assume it was conventional oil and use that.
Congratulations on the nice find!
@Carlos
Okay, cool. You think it might be too old to switch over to synthetic? Thanks!
That's the warning Scotty offers. Switching to synthetic in an older engine may cause seals to start leaking.
@Carlos
Interesting. The owners manual shows a bottle of synthetic oil (5W 20) in their recommendation. The owner seems to have used synthetic as well. I guess I'll use synthetic! Thanks for your thoughts!