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#2500646 - 01/20/12 08:03 PM Can I use 5W30 instead of 5W20?
k1rod Offline


Registered: 12/17/06
Posts: 289
Loc: Arizona
I bought a 2012 Ford Fiesta for my daughter and I was surprised to see that the car calls for 5W20 motor oil. Unfortunately (or fortunately depending on how you look at it), I have several cases of QS 5W30. I guess what I don't know is if there is a real technical reason for using 5W20 or if it was just called out to meet some drubbed up CAFE standard? I know somebody's probably going to jump in here an stearnly warn me about invalidating my warranty but I really don't believe Ford would ever be able to tell the difference. Heck, my oil analysis company can't definitively tell the difference. And conventional 5W30 rapidly shears down to a 5W20 anyway. So... What it the BITOG verdict?

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#2500649 - 01/20/12 08:04 PM Re: Can I use 5W30 instead of 5W20? [Re: k1rod]
civic09 Offline


Registered: 12/02/11
Posts: 401
Loc: PA
Yes, and I say this cause' at my work we only use 5W30 oil in ALL of our fleet. Cadillacs and others also that are luxury get the 5w30 too.


a.v.
_________________________
03' Civic PYB 5W20 127,500 on vehicle

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#2500657 - 01/20/12 08:09 PM Re: Can I use 5W30 instead of 5W20? [Re: k1rod]
beast3300 Offline


Registered: 12/24/09
Posts: 3142
Loc: Ohio
You can use 5w30 however that may void your warranty. You may want to use 5w20 while under warranty.
_________________________
'03 Regal GS L67: PP 5w30/FU3980

'99 Grand Prix L36: QS HM 5w30/STP 3387A E-core, Filtermag

'07 LaCrosse L26: PG 5w30/ProSelect 21040

ASE L1 MT


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#2500658 - 01/20/12 08:10 PM Re: Can I use 5W30 instead of 5W20? [Re: k1rod]
rjacket Offline


Registered: 05/15/10
Posts: 1107
Loc: CA
I have to say that I liked the feel of the MC Syn Blend 5w20 in my Ford but when the Valvoline Synpower rebate of a $1 a quart came up, I could only find 5w30 so that is what I'm using for a while now.

I'm going to be putting QS UD 5w30 in next also as it's what's in my stash. Be interested to see if there's a difference.

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#2500664 - 01/20/12 08:13 PM Re: Can I use 5W30 instead of 5W20? [Re: k1rod]
Clevy Offline


Registered: 11/11/10
Posts: 9783
Loc: Saskatoon canada
Go ahead. Ford spec'd 5w-20 when the CAFE laws went thru. I will never put 5w-20 in my mustang. Never
_________________________
2006 Charger RT
Miles x 2 per oil filter

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#2500666 - 01/20/12 08:15 PM Re: Can I use 5W30 instead of 5W20? [Re: civic09]
Clevy Offline


Registered: 11/11/10
Posts: 9783
Loc: Saskatoon canada
Originally Posted By: civic09
Yes, and I say this cause' at my work we only use 5W30 oil in ALL of our fleet. Cadillacs and others also that are luxury get the 5w30 too.


a.v.

This member works for a national car rental agency. I wonder if they know something and service their fleet accordingly.
_________________________
2006 Charger RT
Miles x 2 per oil filter

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#2500676 - 01/20/12 08:21 PM Re: Can I use 5W30 instead of 5W20? [Re: Clevy]
rjacket Offline


Registered: 05/15/10
Posts: 1107
Loc: CA
Originally Posted By: Clevy
Originally Posted By: civic09
Yes, and I say this cause' at my work we only use 5W30 oil in ALL of our fleet. Cadillacs and others also that are luxury get the 5w30 too.


a.v.

This member works for a national car rental agency. I wonder if they know something and service their fleet accordingly.


Doubt it. Plenty of folks have used 5w-20 for hundreds of thousands of miles and the same with 5w-30.

In a fleet, you might actually realize some fuel economy gains worth something, so the effort of using more than one weight might be worth it.

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#2500680 - 01/20/12 08:23 PM Re: Can I use 5W30 instead of 5W20? [Re: civic09]
johnachak Offline


Registered: 12/08/10
Posts: 1612
Loc: L.I. NY USA
Originally Posted By: civic09
Yes, and I say this cause' at my work we only use 5W30 oil in ALL of our fleet. Cadillacs and others also that are luxury get the 5w30 too.


a.v.

Most GM and especially Cadillacs call for 5w 30.
_________________________
06 Ford Freestyle, PP syn 5w20 MC filter
09 CTS 3.6 D.I. AWD, M1 5w30 Delco filter
Daughters Jeep Compass 2011, 2.4 AWD, 4WD switchable on the fly.
JMH

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#2500685 - 01/20/12 08:25 PM Re: Can I use 5W30 instead of 5W20? [Re: k1rod]
civic09 Offline


Registered: 12/02/11
Posts: 401
Loc: PA
I doubt NOTHING AT ALL. MY boss spoke to all of the makes that my company rents. They told us to use A 5W30 for their service interval on oil changes, and all of these intervals are 5,000 oci's. I DO NOT buy the 5w20 stuff at all after talking to a few members here that are VERY knowledgeable. I dont buy CAFE stuff either. Go ahead and use the 5w20 or 10 whatever. We dont gain much either FOLKS, we use what they the manf. tell us that they want us to use. It is worth the effort yes and my company has NEVER had a oil related FAILURE AT ALL using 5w30.
_________________________
03' Civic PYB 5W20 127,500 on vehicle

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#2500688 - 01/20/12 08:27 PM Re: Can I use 5W30 instead of 5W20? [Re: k1rod]
civic09 Offline


Registered: 12/02/11
Posts: 401
Loc: PA
Thanks Johnachak for that clarification and reasoning.
_________________________
03' Civic PYB 5W20 127,500 on vehicle

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#2500693 - 01/20/12 08:30 PM Re: Can I use 5W30 instead of 5W20? [Re: k1rod]
pushrod Offline


Registered: 08/17/05
Posts: 56
Loc: Maryland
I think that I would use the 5w-30 in warm/hot seasons
However my 2004 ford says 5w-20 on the fill cap and has always had 5w-30 since the first change. If that car is direct injection maybe the 5w-30 will help with fuel dilution?

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#2500694 - 01/20/12 08:31 PM Re: Can I use 5W30 instead of 5W20? [Re: k1rod]
johnachak Offline


Registered: 12/08/10
Posts: 1612
Loc: L.I. NY USA
When I traded in my Mustang (10 w 30 and fl800s) for the Caddy, autozone swapped my still sealed oil and filters for the new 5w30 (for Caddy) and 820s filters (for my Ford) no problem. I am. A regular therre though. Swapped a case of oil and 3 filters.
_________________________
06 Ford Freestyle, PP syn 5w20 MC filter
09 CTS 3.6 D.I. AWD, M1 5w30 Delco filter
Daughters Jeep Compass 2011, 2.4 AWD, 4WD switchable on the fly.
JMH

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#2500700 - 01/20/12 08:34 PM Re: Can I use 5W30 instead of 5W20? [Re: k1rod]
tig1 Offline


Registered: 01/03/09
Posts: 12020
Loc: Illinois
Suprised? Don't be. Ford has been calling for 20wt oil for 10-11 years. I even used M1 5-20 in 1978 in engines calling for 30-40wt oil.
_________________________
2007 Ford Fusion 200,000 miles
M1 0-20 AFE
2007 Ford Focus 168,000 miles
M1 0-20 AFE
10,000 mile OCIs on both engines
M1 ATF
M1 10-30 in all OPE
MC filters


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#2500709 - 01/20/12 08:42 PM Re: Can I use 5W30 instead of 5W20? [Re: k1rod]
crazyoildude Offline


Registered: 07/23/08
Posts: 9808
Loc: New Jersey
being in the engine business i will tell you that if that were mine i would use 5w20 for a number of reasons first of all that is what ford tells you to use and second 5w20 is usually a better oil...

I always say this... But... If you know more than the company that built that engine all the power to you..
Can you use 5w30? sure...is 5w30 better for your engine? no!
_________________________
Check To See That The Oil Jugs You Buy Have The Exact Amount Of Oil In Them And Have An Inner Seal Under The Cap. I Use Mobil 1 And Fram Ultra Filters

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#2500710 - 01/20/12 08:42 PM Re: Can I use 5W30 instead of 5W20? [Re: k1rod]
Triple_Se7en Offline


Registered: 12/04/04
Posts: 7873
Loc: 1/2 hr. north of Detroit
Originally Posted By: k1rod
I bought a 2012 Ford Fiesta for my daughter and I was surprised to see that the car calls for 5W20 motor oil. Unfortunately (or fortunately depending on how you look at it), I have several cases of QS 5W30.


If you knew you had several cases of 5W-30, then why did you buy a 5W-20 vehicle?

Go ahead and use the 5W-30. It won't hurt anything but fuel mileage.
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