I have a '99 Suburban with about 155,000 miles on it. I'm currently using a 10-30 designed for use with older engines. Problem is, my mechanic said he thinks a rod is starting to go bad, and suggested going to a straight 30. I respect his judgement; hes knowledgeable and honest, but I just feel funny about using a single weight oil as opposed to a multi. Should I stay with what I have, or follow his suggestion-or is there a better option?
2007-07-26 16:39:00 · 11 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
If you live in a very cold climate, then you may run into problems with single weight oil. The oil becomes so thick that it makes it hard to start.
During the summer months you shouldn't have any problems however.
2007-07-26 16:42:43 · answer #1 · answered by Fordman 7 · 0⤊ 0⤋
Engine oil has a rating--10-30 for example--the 10 means it will flow in cold weather at start-up--it has a mix that thins the oil that might stiffen in cold weather. 5-30 is no mix-15-30 and 20 30 is alot of mix. No oil will help a valve problem. I have the 350 with 140000, in a 99 Sub--I had the valves, the sludge removed, the intake, the new generation fuel injection--all redone--brand new--gaskets--everything !! 1200 dollars. Cheaper than a ruined motor and a new Sub at 50000 dollars.and I got a 3 year warranty--your guy is fooling you. Sorry--but get it done--a 2 day job. I now get 18mpg.
2007-07-26 16:48:55 · answer #2 · answered by fire_inur_eyes 7 · 0⤊ 0⤋
The straight 30 weight should be fine as long as it is still warm where you live. in the winter you may have a problem as you need a lighter oil, hence 10/30w, when you start the car with in the morning. You should just get the rod bearing changed before the problem gets worse and you lose the entire engine. the 30 weight is just a temporary fix.
2007-07-26 16:51:02 · answer #3 · answered by david d 5 · 0⤊ 0⤋
with that many miles and him thinking its a rod knocking possibly id go to a thicker oil it will help to quieten it down a lot,and also help it in other ways also,id go with a 10-w40 at least,its not going to hurt anything ,it will just make it a little quieter,and that's a good oil to run in a high mileage vehicle,it may not be a rod,and if so the thicker oil wont hurt it none at all,good luck on it.
2007-07-26 16:46:06 · answer #4 · answered by dodge man 7 · 0⤊ 0⤋
if rod bearimg is going than its only a matter of time. No matter what grade oil , Trust your mechanic because 30 S.A.E will extend life a little longer
2007-07-26 16:54:15 · answer #5 · answered by Anonymous · 0⤊ 0⤋
truly, nothing you do aside from replacing bearings is going to solve the problem or hide the situation. a rod knock is a rod knock. if you have a spun bearing, gear oil would not quiet it down. you are looking for a short term fix for a long term problem. i apologize if i seem like i am angry, but just save yourself time and money and get the problem fixed before it gets worse.
2007-07-26 17:32:15 · answer #6 · answered by mdk68gto, ase certified m tech 7 · 1⤊ 0⤋
Why didnt your mechanic offer to replace the rods.Irealize its a 99model with alot of miles but I believe this to be a temp. fix
2007-07-26 16:43:22 · answer #7 · answered by mr.mcscrofe 4 · 0⤊ 0⤋
heavy weight oil will stick better. Might be a good idea.
2007-07-26 16:42:08 · answer #8 · answered by Anonymous · 0⤊ 0⤋
The 30 weight is OK if it doesn't get cold where you are.
2007-07-26 16:45:29 · answer #9 · answered by Anonymous · 0⤊ 1⤋
royal purple.... nothing better.... its the only oil that unlocks horsepower by simply using it
2007-07-26 16:56:28 · answer #10 · answered by Michael 2 · 0⤊ 0⤋