89 5.0 oil question
05-28-2011, 02:22 AM
#11
4th Gear Member
Join Date: Feb 2008
Location: Pensacola, Florida
Posts: 1,465
My '94 calls for 10W-30, but last fall I started running 5W-30 and plan on sticking with it. Car has over 170K on it, and consumption is minimal on Havoline conventional. Depending on driving conditons, I would run a quality dino oil for 3K mile or 6 month changes, but that's just me.
Team Shelby - Why 10W-30
Read posts #30 and #31
Last edited by Unleashedbeast; 05-28-2011 at 02:28 AM.
05-28-2011, 11:29 AM
#12
5th Gear Member
Join Date: Jun 2007
Location: NC
Posts: 2,112
^ Very through posts, Beast. Thanks. I run the 5W-30 for a few reasons. It's my DD, and it sees 3K miles changes, and most miles are racked up crusing on the highway or semi open back roads. Also, consumption doesn't seem any different than with the 10W-30 I ran for a few years.
Last but not least, between my cars and my parent's, I recently "simplified" and now use 5W-30 in everything. A few cars call for 10W-30(the GT, and my parent's 284K 3800 LeSabre). A few call for 5W-30(brother's '00 GT, F150 in sig) and my parent's 24V Taurus calls for 5W-20. I know that may not be a good reason, but I first started running 5W because I had been running a 10W in the truck and switched to 5W. It seemed to "sound" better on start up. Now that is far from scientific haha, but that's what started it all.
Last but not least, between my cars and my parent's, I recently "simplified" and now use 5W-30 in everything. A few cars call for 10W-30(the GT, and my parent's 284K 3800 LeSabre). A few call for 5W-30(brother's '00 GT, F150 in sig) and my parent's 24V Taurus calls for 5W-20. I know that may not be a good reason, but I first started running 5W because I had been running a 10W in the truck and switched to 5W. It seemed to "sound" better on start up. Now that is far from scientific haha, but that's what started it all.
05-29-2011, 09:28 AM
#13
that taurus calls for 5w-20 because the lighter weight oil is needed to get all the way up and make sure the complicated OHC valve system is lubricated properly, and early on start-up. I wouldn't take my chances with a heavier weight not lubricating the top end properly. Even my 4.6 mountaineer, and 5.4 F-150 call for 5w-20.
Last edited by 4literranger485; 05-29-2011 at 09:31 AM.
05-29-2011, 01:19 PM
#14
5th Gear Member
Join Date: Jun 2007
Location: NC
Posts: 2,112
^ If the older 24V 3.0's weren't spec'd for 5W-30, I would be more concerned. Seems to be more of a CAFE deal, than a lubercation deal. Also, I was running 5W-20 MC Blend until the current oil change, but the 3.0 was consuming too much of it. The 5W-30 seems to help some, and I will be putting a new PCV valve in shortly. I'll see what happen from there, and may try a HM oil depending on consumption over the next several thousand miles.
Last edited by 94Blk5.0; 05-29-2011 at 01:21 PM.
05-29-2011, 04:59 PM
#15
Underboss
Join Date: Jan 2006
Location: Helaware
Posts: 20,273
that taurus calls for 5w-20 because the lighter weight oil is needed to get all the way up and make sure the complicated OHC valve system is lubricated properly, and early on start-up. I wouldn't take my chances with a heavier weight not lubricating the top end properly. Even my 4.6 mountaineer, and 5.4 F-150 call for 5w-20.
05-30-2011, 11:26 AM
#17
4th Gear Member
Join Date: Feb 2008
Location: Pensacola, Florida
Posts: 1,465
all of your previous post is untrue. 5W-20 was spec'd due to CAFE laws, and no other reason. It isn't "required" for lubrication purposes in the head and OHC. The same modular Ford engines used in Australia are still spec'd for 5W-30. No internal changes were made. The difference is, Australia doesn't have CAFE laws.
05-30-2011, 05:45 PM
#18
Underboss
Join Date: Jan 2006
Location: Helaware
Posts: 20,273
all of your previous post is untrue. 5W-20 was spec'd due to CAFE laws, and no other reason. It isn't "required" for lubrication purposes in the head and OHC. The same modular Ford engines used in Australia are still spec'd for 5W-30. No internal changes were made. The difference is, Australia doesn't have CAFE laws.
06-01-2011, 03:08 AM
#20
4th Gear Member
Join Date: Feb 2008
Location: Pensacola, Florida
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