Dealer doesn't use 5-20 weight oil for 5.7 engine; Toyota's reply - TundraTalk.net - Toyota Tundra Discussion Forum
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Old 04-10-2008, 01:12 PM   #1 (permalink)
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Dealer doesn't use 5-20 weight oil for 5.7 engine; Toyota's reply

Yesterday I asked Toyota about my dealer's use of 5/30 weight oil in my 5.7 engine instead of the 5/20 specified in the owners manual (on two separate pages plus imprinted on the engine's filler cap). I'll copy Toyota's reply below. They responded quickly and invite more inquiries by phone or email.
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Customer 04/09/2008 04:52 PM MY DEALER (TOYOTA OF EL CAJON) USES ONLY 5-30 WEIGHT OIL ON OIL CHANGES. THE OWNER'S MANUAL SPECIFIES 5-20 WEIGHT OIL FOR THE 5.7 TUNDRA ENGINE. (1) WILL 5-30wt OIL HURT THE 5.7 ENGINE? (2) WHY DOES TOYOTA SPECIFY 5-20 FOR THE TUNDRA 5.7 V8; BUT 5-30 FOR THE 4.0 AND 4.7 TUNDRA ENGINES?
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We are sorry Toyota Of El Cajon did not put the recommended weight of oil in your Tundra.
We recommend the use of 5W-20 or 0W-20 engine oil for the 5.7 liter 2007 Tundra. We recommend these weight oils for this engine for better fuel economy. The use of 5W-30 should not adversely affect your engine. The more recent engine designs e.g. the 5.7 liter engine operate better with the lighter weight engine oils whereas the earlier engine designs work better with 5W-20. <[I THINK THEY MEANT TO SAY 5W-30 HERE]
Your email has been documented at our National Headquarters under file #200804100187.

If we can be of further assistance, please feel free to contact us via email or by calling 800-331-4331. We are available from 5 AM to 6 PM, Pacific Time, Monday through Friday and from 7 AM to 4 PM, Pacific Time, on Saturdays.

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Old 04-10-2008, 06:14 PM   #2 (permalink)
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The dealer probably got a deal on 5w-30...and can make another dollar. I would insist the dealer change it to factory spec.
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Old 04-10-2008, 06:30 PM   #3 (permalink)
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the 5-20 is to thick anyway
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Old 04-10-2008, 09:08 PM   #4 (permalink)
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Man what a reply. Cover thy butt. I use Castrol synthetic from the start.
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Old 04-13-2008, 01:51 AM   #5 (permalink)
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Did you mean "thin"?

Quote:
Originally Posted by 1sicktundra View Post
the 5-20 is to thick anyway
5-20 is thinner than, say, 5-30. The smaller the number, the THINNER the oil. That's why it gives better gas mileage.
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Old 04-13-2008, 02:21 AM   #6 (permalink)
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The thinner oil should cut down on start up wear too.
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Old 04-13-2008, 12:20 PM   #7 (permalink)
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Oil in 4.7

So is it better to use 5W-20 in a 07' 4.7 that recommends 5W-30. My experience is that with 5W-30 4.7 engine nice and quite put 5W-30 syn-blend now it has a ticking noise next oil change was going back to conventional oil 5W-20 for better gas mileage. I don't believe in pure synthetic oil ruined two engines 4.6L in a 2001 F-150 5W-20 Valvoline Syn-power and a 5.4L in a 2003 F-150 using 5W-20 Mobile One. Valvoline wasn't so bad but Mobile One caused the 5.4L to burn up hydraulic lifters twice. so all you people putting that Mobile One crap in your 5.7 I wish you luck!
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Old 04-13-2008, 06:08 PM   #8 (permalink)
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I think I see a pattern here: 2 Fords with bad engines!
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'07 RCSB 4x4, 5.7. Much Faster than my modded Hemi was. Insulated intake & box. Drop in K&N. Removed top filter. Bypassed TB coolant hose to keep intake cold. Valve cover hoses to breather, not intake. 305-50-20 Yoko's on 20 x 9 chrome MB 5 spokes, Debadged, More to come...
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Old 04-13-2008, 08:14 PM   #9 (permalink)
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Last time I checked mobile 1 is the recommended oil for the corvette, maybe its just too good of an oil for a ford?
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Old 04-14-2008, 05:08 PM   #10 (permalink)
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Oil is oil. I am 998 miles into my oil change where the dealer added 5w30 instead of the recommended stuff and i got 17.80 MPG combined driving so no loss in MPG at all...
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Old 04-14-2008, 07:34 PM   #11 (permalink)
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My dealer said their "regular" oil changes were 5-30 but they recommended the 5-20 for about $40 more. The oil is "Toyota" but is really just mobile one. They did tell me that coming in at 5k, 10k, 15k, etc. for tire rotation would also work for oil changes without affecting the warranty. Significantly higher than the jiffy lube but getting to stretch it to 5k helps. I also am a big fan of mobile one and changing at 5k so I'm fine with it. FYI
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Old 04-14-2008, 07:44 PM   #12 (permalink)
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With all the discussions about oil on this forum and provided references to educational sites the ignorance concerning oil on this forum is suprising.
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Old 04-14-2008, 11:53 PM   #13 (permalink)
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I got my first oil change by Toyota down here, they also put in 5w-30 quaker state. I thought this is some bs, but like every one they made me feel like a little brat, so I took for now, but I was surprised that I gained 2 mpg. So maybe I'll stick with the 5-30.
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Old 04-15-2008, 09:50 PM   #14 (permalink)
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Quote:
Originally Posted by alreadydead View Post
With all the discussions about oil on this forum and provided references to educational sites the ignorance concerning oil on this forum is suprising.

So school us junior...LOL You know it all? Guess my 1970 Road Runner was wrong to use that 10-30 for those 20 years without issue...LOL
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Last edited by Nukedog; 04-15-2008 at 09:53 PM.
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Old 04-15-2008, 09:53 PM   #15 (permalink)
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Quote:
Originally Posted by Nukedog View Post
So school us then boy? Many of us may be more in the know that you. Well comeone there MR Engineer to save the world 1 synthetic at a time...


Clownz are everywhere....LOL
haha, I agree, but everyone has the right to voice there opinion.
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