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Oil for Honda Mower #1432266 04/11/09 10:35 PM
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SubLGT Offline OP
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The owner's manual for my 20 year old Honda mower, with the GXV120 engine, specifies a 10W40 oil for all temperature use. For the last year I have been using Rotella 10W30 in this old mower. Are the latest Honda mowers still using 10W40, or is Honda recommending a lighter oil for their latest mowers?

Re: Oil for Honda Mower [Re: SubLGT] #1432276 04/11/09 10:47 PM
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bretfraz Offline
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I don't have a Honda mower but the units I've seen on sale include a bottle of 10W-30 oil. Next time you're at Home Depot, check out the Honda's on display and see for yourself.

In the GX and GC series engines I've maintained (non-mower use) I've used either a 10W-30 or 30W.


'98 Dodge Ram 1500, Mobil 5000 10-30
'08 Chrysler 300C, Pennz Plat 5-20
Re: Oil for Honda Mower [Re: bretfraz] #1432442 04/12/09 08:28 AM
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SrDriver Offline
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I have a newer mower with that engine and it calls for 10W30. I use Super Tech Synthetic - 20 oz as I recall and change it a couple of times a season.

Re: Oil for Honda Mower [Re: SubLGT] #1432477 04/12/09 09:26 AM
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ARB1977 Offline
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 Originally Posted By: SubLGT
The owner's manual for my 20 year old Honda mower, with the GXV120 engine, specifies a 10W40 oil for all temperature use. For the last year I have been using Rotella 10W30 in this old mower. Are the latest Honda mowers still using 10W40, or is Honda recommending a lighter oil for their latest mowers?

Mine calls for 10W30/30W...I use Amsoil Small engine forumula. What was used during its 19 years of life?


2015 Tacoma 4.0L 60K (as of 02/23/18)
AMSOIL SS 0W30 / Toyota filter

2018 CRV 1.5L (as of 05/11/18)
Factory fill / Honda filter
Re: Oil for Honda Mower [Re: ARB1977] #1432786 04/12/09 06:51 PM
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SubLGT Offline OP
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For the first 19 years it has had various dino 10W40s. Hard to start most of last year, but once it is started it runs fine.

Re: Oil for Honda Mower [Re: SubLGT] #1432954 04/12/09 10:51 PM
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ARB1977 Offline
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 Originally Posted By: SubLGT
For the first 19 years it has had various dino 10W40s. Hard to start most of last year, but once it is started it runs fine.

Maybe the pull start is [censored] out.


2015 Tacoma 4.0L 60K (as of 02/23/18)
AMSOIL SS 0W30 / Toyota filter

2018 CRV 1.5L (as of 05/11/18)
Factory fill / Honda filter
Re: Oil for Honda Mower [Re: ARB1977] #1446969 04/27/09 09:02 PM
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live_to_hunt Offline
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I run super tech 5w30 in my Honda motor change it once a year its a Honda any oil is fine...


2010 Tundra
2001 Harley Heritage Softail Classic
Re: Oil for Honda Mower [Re: live_to_hunt] #1447023 04/27/09 09:46 PM
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4esorselrahc Offline
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Castrol Syntec 10W-30 here. Changed it twice so far, but I've only had mine for less than a year.. Using a Honda HRX217K2HXA. It's a lovely mower, and it starts on the first pull every time, even the first cold start of the season. I know I'm spoiled....

Re: Oil for Honda Mower [Re: 4esorselrahc] #1447436 04/28/09 11:53 AM
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1999nick Offline
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My mower, purchased in 2000, has the Honda 160 GCV. For most of its life, it got a yearly change of Mobil 1 5W30. One year, I had a quart of M1 0W30 laying around, and I used that. I have an hour meter on this engine, and it has been used betwewen 55 and 65 hours a year. It has never used any oil between yearly changes. I used the last of my old formula SL M1 year before last, and I am now using Mobil 1 High Mileage 10W30 in it, which is still an SL formulation. It is still not requiring any oil addition in a 60 hour OCI.

Re: Oil for Honda Mower [Re: 1999nick] #1450454 05/01/09 12:06 AM
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Brons2 Offline
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My mower has the 160GCV as well, and I just filled it with Maxlife 10w30.

On my old Briggs powered Snapper, I had best results with M1 TDT 5w-40, it would tend to burn off 30wt over the course of a season. The dipstick never moved with the M1 TDT. I still have it, runs good but I should probably Craigslist it.


2012 Hyundai Sonata GLS 6MT 2.4GDI, ProDS 5w & 10w30 seasonal, XG9688 filter, 2018 Mitsubishi Outlander SEL 2.4 CVT, Dealership Castrol 0w20, Mazda filter.
Re: Oil for Honda Mower [Re: SubLGT] #1473929 05/22/09 08:53 PM
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rickeroo Offline
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I too have a 20+ year old Honda--HRS21-FH push mower with the standard 3 1/2 HP 100cc GXV engine. At first I used 10W-30 but soon realized that I only used it when it was warm outside so I switched to 20W-50 and noticed an increase in torque, especially when under heavy load, ie tall grass. I figure that the extra film strength of 20W-50 reduces blow-by. I've come to believe that if properly cared for, these mowers (with their commercial-grade engines) are immortal.

Re: Oil for Honda Mower [Re: rickeroo] #1474275 05/23/09 07:31 AM
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ARB1977 Offline
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I hoping to give my GCV160 a good start. Last season i started using Amsoil 10W30/30W.


2015 Tacoma 4.0L 60K (as of 02/23/18)
AMSOIL SS 0W30 / Toyota filter

2018 CRV 1.5L (as of 05/11/18)
Factory fill / Honda filter
Re: Oil for Honda Mower [Re: SubLGT] #1474942 05/23/09 10:18 PM
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SubLGT Offline OP
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 Originally Posted By: SubLGT
For the first 19 years it has had various dino 10W40s. Hard to start most of last year, but once it is started it runs fine.


Last month, I disassembled and cleaned the carburetor for the first time in 20 years. Glad that Honda still stocks all the gaskets, cost about $30. The carb was only mildly dirty, with some reddish gunk inside it. This little carb appears to be a high quality unit.

Starts much easier now. Have Rotella T 10W30 in it now. Should be good for another 20 years.

Re: Oil for Honda Mower [Re: SubLGT] #1475916 05/25/09 01:07 AM
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nthach Offline
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I've filled my neighbor's GCV160 with MaxLife 10W-30.

I used Chevron in ours before we got rid of our lawn.

Re: Oil for Honda Mower [Re: nthach] #1476594 05/25/09 09:40 PM
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FZ1 Offline
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10/30 M1 EP synthetic July and November changes. Oil comes out almost as clear as it goes in.

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