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Car Forum / Jeep / August 2005Using the proper oil
I recently did an oil change on a '93 Buick Century. I used a 5W/ 30 oil. After I was finished putting the oil in, I read on the cap " use 10W/30". Is it a problem if I use a lighter weight? Thanks. You are supposed to read the cap before putting oil in, but I guess you figured that out by now. 5W30 is not optimal, but it won't make your engine seize after ten miles. If you change your oil every 2000 to 3000 miles, I wouldn't worry about it. If you change it at a year or 7000 miles, then consider putting 10W30 in it. What are we talking about here, ten dollars worth of oil? Your oil gauge or indicator light will tell you if the pressure in the oil feed passages is too low, but that isn't your real worry. What you have to worry about, is the instantaneous pressure at the crankshaft bearings. 5W30 is probably good enough, unless you plan on racing the vehicle. There is no real answer to this question. Earle > I recently did an oil change on a '93 Buick Century. I used a 5W/ 30 > oil. After I was finished putting the oil in, I read on the cap " use > 10W/30". Is it a problem if I use a lighter weight? Thanks. Probably not, but if it's a 93 it probably has a lot of time (miles) on it, so the clearances are even wider than when made. It's usually best to put in heavier oils the older an engine gets. I think you are asking for it. Especially if it's still up around a hundred degrees, and you use the air conditioning. Just, consider it an flush, like they did in the old days. Like you may be hearing your main bearings knock as they refill after it sitting, now God Bless America, ßill O|||||||O mailto:LWHughes3rd@aol.com http://www.billhughes.com/ > I recently did an oil change on a '93 Buick Century. I used a 5W/ 30 > oil. After I was finished putting the oil in, I read on the cap " use > 10W/30". Is it a problem if I use a lighter weight? Thanks. You needn't change the filter again, just the oil.  Signature. Billy_Ray@SPAM.fuse.net (remove SPAM) 2002 Jeep WJ 4 Liter Automatic Brilliant Black Crystal Pearl Coat . > I think you are asking for it. Especially if it's still up around a > hundred degrees, and you use the air conditioning. Just, consider it an [quoted text clipped - 6 lines] >> oil. After I was finished putting the oil in, I read on the cap " use >> 10W/30". Is it a problem if I use a lighter weight? Thanks. Hi Bill, I think I'd get all those metal to metal shavings out of there, too. The car's a '93 at twenty thousand a year it has well over two hundred thousand miles, now the equivalent of three. God Bless America, ßill O|||||||O mailto:LWHughes3rd@aol.com http://www.billhughes.com/ > You needn't change the filter again, just the oil. > [quoted text clipped - 3 lines] > 2002 Jeep WJ 4 Liter Automatic > Brilliant Black Crystal Pearl Coat If he has that many miles he should consider 15W-40 or 20W-50 wouldn't you think? I used Shell's Rotella T 15W-40 for a long time in high mileage cars Signature. Billy_Ray@SPAM.fuse.net (remove SPAM) 2002 Jeep WJ 4 Liter Automatic Brilliant Black Crystal Pearl Coat . > Hi Bill, > I think I'd get all those metal to metal shavings out of there, [quoted text clipped - 10 lines] >> 2002 Jeep WJ 4 Liter Automatic >> Brilliant Black Crystal Pearl Coat Hi Bill, Yes, I use Pennzoil 20/50 in my '89 Thunderbird, and '78 Bronco, both with over three hundred thousand miles on them without have their heads removed: http://www.billhughes.com/smog.jpg God Bless America, ßill O|||||||O mailto:LWHughes3rd@aol.com > If he has that many miles he should consider 15W-40 or 20W-50 wouldn't you > think? [quoted text clipped - 6 lines] > 2002 Jeep WJ 4 Liter Automatic > Brilliant Black Crystal Pearl Coat Thanks for all the input. Believe it or not, the car only has 70K on it. It was a grandma's car that was only driven to church on Sunday's. 1 owner. My wife got it 2 years ago with 23K on it. It is nearing the end of summer, so should I worry about changing it to 10W/30 or 2000-3000 Miles... It is not the cost of the oil... its the time..... Does the owners manual say anything about alternate oil viscosities? I have a vague recollection GM had gone to 5W-30 before that.... Signature. Billy_Ray@SPAM.fuse.net (remove SPAM) 2002 Jeep WJ 4 Liter Automatic Brilliant Black Crystal Pearl Coat Sharing is why we are all here....... or should be. . > Thanks for all the input. Believe it or not, the car only has 70K on > it. It was a grandma's car that was only driven to church on Sunday's. > 1 owner. My wife got it 2 years ago with 23K on it. It is nearing the > end of summer, so should I worry about changing it to 10W/30 or > 2000-3000 Miles... It is not the cost of the oil... its the time..... 5W-30 and 10W-30 are both the same 30 weight oil once warmed up. In talking to both Mobil and Shell reps a few times on the 5W vs. 10W at startup, they have begun to change my thinking on using 5W-30 vs. using 10W-30. I used to avoid 5W-30 thinking the 5 weight oil when the engine was cold was too thin. Both reps assured me that the 5 weight oil circulates a lot faster when the engine is cold which gives better protection at start up. That both 5W-30 and 10W-30 become 30 weight once warm means they're equal at that time. :) > I think you are asking for it. Especially if it's still up around a > hundred degrees, and you use the air conditioning. Just, consider it an [quoted text clipped - 6 lines] >>oil. After I was finished putting the oil in, I read on the cap " use >>10W/30". Is it a problem if I use a lighter weight? Thanks. SignatureJerry Bransford PP-ASEL N6TAY See the Geezer Jeep at http://members.cox.net/jerrypb/ Do you use 5W/30? http://www.billhughes.com/lubeSchedule.pdf It's not recommended for temperatures above freezing. God Bless America, ßill O|||||||O mailto:LWHughes3rd@aol.com > 5W-30 and 10W-30 are both the same 30 weight oil once warmed up. In > talking to both Mobil and Shell reps a few times on the 5W vs. 10W at [quoted text clipped - 4 lines] > protection at start up. That both 5W-30 and 10W-30 become 30 weight > once warm means they're equal at that time. :) The necessity to go to a 5W-X isn't even fathonable until you own an AMC 258 in Northern Canada LMARO !!!! > 5W-30 and 10W-30 are both the same 30 weight oil once warmed up. In > talking to both Mobil and Shell reps a few times on the 5W vs. 10W at [quoted text clipped - 15 lines] > >>oil. After I was finished putting the oil in, I read on the cap " use > >>10W/30". Is it a problem if I use a lighter weight? Thanks. That would be in the Great White North. ;-) God Bless America, ßill O|||||||O mailto:LWHughes3rd@aol.com http://www.billhughes.com/ > The necessity to go to a 5W-X isn't even fathonable until you own an AMC 258 > in Northern Canada LMARO !!!! No, it'll leak out faster than the thicker oil, that's a downside. But it'll get into the tight places -- if there are any left -- easier in winter, that's an upside. >I recently did an oil change on a '93 Buick Century. I used a 5W/ 30 > oil. After I was finished putting the oil in, I read on the cap " use > 10W/30". Is it a problem if I use a lighter weight? Thanks. |
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