OIL 101
first number is the temp range, w means it can be used in winter, last number is the viscosity of the oil (how thick or watery it is or 'its ability to flow').
5w30 is what the ford manual that is in your glove box (or would have been iif one of the owners before you didnt loose it) says.
10w30 is fine if it doesnt get too cold where you live (nyc 10w30 is fine)
5w just means it can work in colder temps compared to 10w
back in the old days in an old engine people used to move up to 10w40 (or 5w40) to use thicker oil to compansate for the wear of the engine. Many old-oldskool people still do this.
If you use oil that is to thick (40 or 50 weight) it will take power away from the engine because it alone will be a load on the engine.
If the oil is to thin it will be to watery to actually protect the engine from friction.
Synbthetyc oil are supposed to be better and have a lower friction coefficient and are a less of a load on engine even if its the same grade oil as the non-synthetic. In fact synthetic oil can improove your millage by a bit. (i get about 2 mpgs more)
A while ago FORD had a TSB which stated that after new testing they have concluded that many of their old engines can in fact use 5w-20 instead of 5w-30. Vulcan was one of the many many engines listed in the TSB. This tsb was on the old boards somewhere and started many debates if 5w20 is to thin or not. In fact i think if you get a new vulcan it will have 5w20 in it. I have used 5w20 in my vulcan and it worked fin no obviouse difference, it was a non synthetic 5w20 yet i got the same milage as with synthetic oils do to the lighter weigt.
Thats all i got to say about oil, probably said to much. I rether give you the info and have you make the decision then saying 'use 5w-30'.
Now what kind of accident did you have with the car? Could it be something got damaged from the accident and caused this problem?
first number is the temp range, w means it can be used in winter, last number is the viscosity of the oil (how thick or watery it is or 'its ability to flow').
5w30 is what the ford manual that is in your glove box (or would have been iif one of the owners before you didnt loose it) says.
10w30 is fine if it doesnt get too cold where you live (nyc 10w30 is fine)
5w just means it can work in colder temps compared to 10w
back in the old days in an old engine people used to move up to 10w40 (or 5w40) to use thicker oil to compansate for the wear of the engine. Many old-oldskool people still do this.
If you use oil that is to thick (40 or 50 weight) it will take power away from the engine because it alone will be a load on the engine.
If the oil is to thin it will be to watery to actually protect the engine from friction.
Synbthetyc oil are supposed to be better and have a lower friction coefficient and are a less of a load on engine even if its the same grade oil as the non-synthetic. In fact synthetic oil can improove your millage by a bit. (i get about 2 mpgs more)
A while ago FORD had a TSB which stated that after new testing they have concluded that many of their old engines can in fact use 5w-20 instead of 5w-30. Vulcan was one of the many many engines listed in the TSB. This tsb was on the old boards somewhere and started many debates if 5w20 is to thin or not. In fact i think if you get a new vulcan it will have 5w20 in it. I have used 5w20 in my vulcan and it worked fin no obviouse difference, it was a non synthetic 5w20 yet i got the same milage as with synthetic oils do to the lighter weigt.
Thats all i got to say about oil, probably said to much. I rether give you the info and have you make the decision then saying 'use 5w-30'.
Now what kind of accident did you have with the car? Could it be something got damaged from the accident and caused this problem?