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#2328547 - 07/26/11 03:53 PM 5-40 Rotella in vehicles calling for 5-20 oil?
callbay Offline


Registered: 05/29/05
Posts: 713
Loc: Ozark Mountains
We use 5-40 Rotella in almost everything my family has. Trucks, heavy equipment, cars, boats, even small air cooled gas engines. We recently went 700 hours on an OCI for a Cat backhoe by mistake with no apparent problems. It only has an 8 quart capacity too.

The only thing we don't use it in is for cars calling for for 5-20.

Do you guys think there would be any problems using 5-40 Rotella in vehicles calling for for 5-20 other than a tad less mpg.(as long as they were out of warranty)?

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#2328550 - 07/26/11 03:56 PM Re: 5-40 Rotella in vehicles calling for 5-20 oil? [Re: callbay]
mongo161 Offline


Registered: 07/11/10
Posts: 3569
Loc: Coney Island, NY
Good question.....
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I get by with a little help from my friends....listen with your eyes....it's the ONLY way to believe what you hear...

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#2328554 - 07/26/11 03:58 PM Re: 5-40 Rotella in vehicles calling for 5-20 oil? [Re: callbay]
addyguy Offline


Registered: 09/08/05
Posts: 13874
Loc: Canada
Certain cars will tolerate this better than others - what vehicle are we talking about?
_________________________
2010 Kia Soul 2U - 2.0L I-4, auto, 86k miles.
QSGB 5W-20, NAPA select filter(?)

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#2328561 - 07/26/11 04:03 PM Re: 5-40 Rotella in vehicles calling for 5-20 oil? [Re: callbay]
zyxelenator Offline


Registered: 01/24/11
Posts: 1340
Loc: Louisville,KY
In modern cars and their engines, gaps and passages are much smaller between parts than they used to be.
If engine is old, and worn out,gaps should increase, and 40 weight oil should flow as 20 when it was new. In case of new, or good maintained engine, 40 weight oil might flow worse in tiny gaps and delay lubrication, which will lead to excessive wear and drop in mpg.
JMO
_________________________
99 Camry V6, 5 speed M/T
148k miles.Current fill:5w-30 G-oil,OVERSIZE P1, some Kreen and Ceratec added.
Lubro Moly 75w90 synthetic hypoid oil,with Moly

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#2328562 - 07/26/11 04:04 PM Re: 5-40 Rotella in vehicles calling for 5-20 oil? [Re: callbay]
Quattro Pete Offline


Registered: 10/30/02
Posts: 31615
Loc: Great Lakes
Originally Posted By: callbay
Do you guys think there would be any problems using 5-40 Rotella in vehicles calling for for 5-20 other than a tad less mpg.(as long as they were out of warranty)?

I wouldn't expect any problems. T6 is API SM-rated after all.
_________________________
'02 530i (Edge HM 10W-40)
'15 Q5 3.0T (Edge 5W-40)

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#2328576 - 07/26/11 04:20 PM Re: 5-40 Rotella in vehicles calling for 5-20 oil? [Re: callbay]
callbay Offline


Registered: 05/29/05
Posts: 713
Loc: Ozark Mountains
The vehiles I am talking about are a 2007 Mazda MX5 (Miata) and a 2011 Ford Fusion 2.5 Liter 4 cyl when the warranty is up.

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#2328628 - 07/26/11 05:20 PM Re: 5-40 Rotella in vehicles calling for 5-20 oil? [Re: callbay]
ET16 Offline


Registered: 10/28/08
Posts: 919
Loc: MD
Why do it? You would lose horsepower and mileage.

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#2328630 - 07/26/11 05:21 PM Re: 5-40 Rotella in vehicles calling for 5-20 oil? [Re: callbay]
Radman Offline


Registered: 11/24/10
Posts: 485
Loc: Detroit, Michigan
Originally Posted By: callbay
The vehiles I am talking about are a 2007 Mazda MX5 (Miata) and a 2011 Ford Fusion 2.5 Liter 4 cyl when the warranty is up.

I seriously doubt there will be any problem with your choice of oil. I personally would be using Castrol GTX 5W30 instead because it is cheaper both at purchase & at the pump.
_________________________
2006 Maxima 120K M1-105, M1 0W40
2006 Sentra 90K M1-105, GTX 5W30
2010 Altima 20K M1-105, GTX 5W30
2013 Yamaha FZ1 1K PL1410, SRT5 15W40

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#2328637 - 07/26/11 05:23 PM Re: 5-40 Rotella in vehicles calling for 5-20 oil? [Re: callbay]
Rob_Roy Offline


Registered: 10/26/08
Posts: 902
Loc: Northern, NY
Neither vehicle will blow up b/c of 5w40. If you give it a try, please post back with the results.
_________________________
2015 Subaru Legacy 3.6
2014 Subaru Outback 2.5
1999 Ford F350, V10 workhorse

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#2328649 - 07/26/11 05:31 PM Re: 5-40 Rotella in vehicles calling for 5-20 oil? [Re: callbay]
OldCowboy Offline


Registered: 05/28/11
Posts: 734
Loc: SW Missouri
I personally wouldn't use a 40 weight oil in a car calling for a 20 weight oil.

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#2328650 - 07/26/11 05:32 PM Re: 5-40 Rotella in vehicles calling for 5-20 oil? [Re: ET16]
Radman Offline


Registered: 11/24/10
Posts: 485
Loc: Detroit, Michigan
Originally Posted By: ET16
Why do it? You would lose horsepower and mileage.

What do you think will be the result?
A Loss of 3HP at top end, and 1/2MPG in the city. Neither will be a devastating loss.
_________________________
2006 Maxima 120K M1-105, M1 0W40
2006 Sentra 90K M1-105, GTX 5W30
2010 Altima 20K M1-105, GTX 5W30
2013 Yamaha FZ1 1K PL1410, SRT5 15W40

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#2328699 - 07/26/11 06:31 PM Re: 5-40 Rotella in vehicles calling for 5-20 oil? [Re: callbay]
fdcg27 Offline


Registered: 09/25/09
Posts: 11978
Loc: OH
I doubt you'd have any problems, and might not even notice the difference, except for quieter operation.
Try it and see how it goes.
I'd bet you'd be fine.
How cold do you see over the winter in the Ozarks?
_________________________
12 Accord LX 45K TGMO 0W-20
09 Forester 67K PU 5W-30
02 Accord 144K GOil 5W-30
01 Focus ZX3 112K M1 5W-20
95 BMW 318iC 155K Defy 10W-40

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#2328758 - 07/26/11 07:24 PM Re: 5-40 Rotella in vehicles calling for 5-20 oil? [Re: callbay]
friendly_jacek Offline


Registered: 05/04/03
Posts: 6430
Loc: southeast US
If you drive hwy and especially tow, go for it. If you drive city and especially short trips, too huge MPG penalty.

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#2328799 - 07/26/11 08:09 PM Re: 5-40 Rotella in vehicles calling for 5-20 oil? [Re: callbay]
glum Offline


Registered: 02/03/11
Posts: 820
Loc: Charlotte, NC
Does the owner's manual say "Use 5W-20, unless the BITOG folks say 5W-40 is OK"?
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Wish I could say it's been nice, BITOG.

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#2328843 - 07/26/11 08:52 PM Re: 5-40 Rotella in vehicles calling for 5-20 oil? [Re: ET16]
JRed Offline


Registered: 06/01/09
Posts: 1688
Loc: Virginia
Just do it. You will in all honesty probably never know the difference.

Then again, 5w-20 dino juice can be had even cheaper than Rotella, so unless you want to pour Rotella T6 in everything just because it's on hand you can probably save a few bucks by buying PYB 5w-20 or Mobil Super 5000 5w-20 in 5qt jugs.
_________________________
06 Subaru Impreza WRX - Sold. The only mechanical thing I'll ever love.
07 Toyota Prius - Cheap synthetic and PureOne filters.

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