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06-06-2016, 10:58 PM
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#1
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Senior Member
Join Date: May 2016
Location: Everywhere
Posts: 156
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Synthetic Oil Flush
I had a mechanic tell me today that the better option is to put Synthetic Oil in my 2007 W22 and change the filter, run it on a trip than repeat the process. Does anyone have an opinion on this as the motor has 73,000 miles on it with no previous service history?
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07 Newmar Canyon Star 3410 - 34' 11 FT WH W22 Chassis 8.1L 75K, 2013 Honda Fit Toad, Full Time Family
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06-06-2016, 11:09 PM
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#2
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Senior Member
Join Date: Jul 2012
Posts: 1,450
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I feel a gas motor pulling 20,000 lbs + is a severe service application. Synthetic oil is designed for exactly those conditions. Full synthetic oil is money well spent in a gasser motorhome, in my opinion. A complete oil drain and filter change is all that is needed to switch from dinosaur to synthetic oil. All the best.
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George R. - Fulltiming since January '03
2007 Newmar Mountain Aire 3991
2012 Chevy Malibu LT1
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06-06-2016, 11:17 PM
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#3
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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In a DP I wouldn't do it, for a gas rig that I was going to keep for 20 years I might change over. The Allison trans now come with synthetic and they last almost forever.
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2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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06-06-2016, 11:27 PM
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#4
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Senior Member
Join Date: May 2016
Location: Everywhere
Posts: 156
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One bit of feedback I received from an old school family member was, why run a newer oil that could possibly clear our any build-up and possibly have you burning more oil.
I'm no mechanic but I always like to use the best products available but also learnt an expensive lesson with a car recently and the old saying, 'if it aint broken don't fix it' rings loud in the back of my mind from it. Hopefully I can get some other feedback from members for one way or the other.
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07 Newmar Canyon Star 3410 - 34' 11 FT WH W22 Chassis 8.1L 75K, 2013 Honda Fit Toad, Full Time Family
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06-07-2016, 05:07 AM
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#5
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Senior Member
Workhorse Chassis Owner
Join Date: Dec 2004
Location: Baraboo, Wisconsin
Posts: 1,728
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The advantages of synthetic oil in the transmission are well documented. I switched over years ago. The transmission of a motorhome is one of the more expensive things that will break if not taken care of. The cost of synthetic oil versus a new transmission makes it a no-brainer.
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Steve & Nancy 
2005 Itasca Sunrise 33', W20 Chassis, Ultrapower, Henderson Trac Bar
2012 Chevy Captiva Sport AWD, ReadyBrute Elite Tow Bar, Blue Ox Base Plate, Protect-A-Tow
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06-07-2016, 05:52 AM
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#6
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Senior Member
National RV Owners Club Workhorse Chassis Owner
Join Date: Aug 2010
Location: Portland, Oregon
Posts: 872
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Question, are we talking about transmission or engine? The post sounds like He is asking about the engine?? If so I never heard of flushing out the oil to change to synthetic.
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2004 National Sea Breeze LX8375, Towing a 2012 Liberty.
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06-07-2016, 07:58 AM
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#7
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Senior Member
Join Date: May 2016
Location: Everywhere
Posts: 156
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Talking engine, replace oil & filter than change both again after a trip or two
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07 Newmar Canyon Star 3410 - 34' 11 FT WH W22 Chassis 8.1L 75K, 2013 Honda Fit Toad, Full Time Family
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06-07-2016, 05:08 PM
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#8
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Senior Member
Join Date: Nov 2013
Posts: 5,774
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I would switch but don't understand the logic in dumping after a trip or two. Change at normal interval. I run synthetic in all my vehicle and the Corvette requires it. GM did that because there was no oil cooler from the factory. The RV gets the European Castrol 0W30.
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2015 Tiffin Phaeton 40QBH
2018 Chevrolet Colorado Toad
Roadmaster Tow Setup
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06-07-2016, 05:15 PM
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#9
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Junior Member
Join Date: Sep 2015
Posts: 17
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I changed to syn. After I bought my 1986 454 with 75000 . shell r6 after 6 oil changes at 3000 each no problem.
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06-07-2016, 07:01 PM
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#10
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Senior Member
Newmar Owners Club Winnebago Owners Club Freightliner Owners Club
Join Date: Mar 2016
Location: Kingman Az
Posts: 1,686
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98 p30 gasser, change oil and filter every 5k miles. Use cheapo Walmart 10w30. 129k on engine, most with toad or boat on back. no problems. Also used same oil on fleet products for my newpapaer business for 32 years changing at the same mileage. Never replaced an engine. Been working on engines for 52 years. Synthetic oil is a waste of good money.
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May your black water hose never break!
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06-07-2016, 07:15 PM
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#11
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Senior Member
Join Date: Jul 2014
Posts: 35,419
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Quote:
Originally Posted by lonfu
98 p30 gasser, change oil and filter every 5k miles. Use cheapo Walmart 10w30. 129k on engine, most with toad or boat on back. no problems. Also used same oil on fleet products for my newpapaer business for 32 years changing at the same mileage. Never replaced an engine. Been working on engines for 52 years. Synthetic oil is a waste of good money.
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I'm with you on regular oil.
35 years maintaining municipal equipment, always using "State bid" oil.
Only oil related failure was due to an empty crankcase. Dirty air from bad air intake caused the oil consumption.
Synthetic oils claim is longer service intervals. Then many change it sooner then recomended.
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06-07-2016, 07:16 PM
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#12
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Senior Member
Join Date: Jan 2014
Posts: 4,669
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I agree with lonfu. I've gotten 80 to 100k on all my vehicles and only lost one engine. A 59 willys L-head jeep that somehow got an oil-pan full of sand.
I realize some would call RV use heavy duty and if running synthetic makes you feel good go for it. But to do a synthetic fill and dump it after one trip sounds like snake oil medicine to me. Maybe your mechanic needs a new propeller for his boat
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2023 Winnebago Travato
2023 Airstream Flying Cloud BH 30'
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06-07-2016, 07:45 PM
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#13
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Senior Member
Join Date: May 2016
Location: Everywhere
Posts: 156
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Appreciate everyone's feedback. I purchased Pennzoil 550038221 Platinum 5W-30 Full Synthetic on Amazon and it was well priced. Will give it a go and wont worry about changing it for 3000 miles.
If I had got to the replies earlier, I say I would have not gone the synthetic route.
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07 Newmar Canyon Star 3410 - 34' 11 FT WH W22 Chassis 8.1L 75K, 2013 Honda Fit Toad, Full Time Family
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06-10-2016, 11:17 AM
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#14
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Senior Member
Join Date: Feb 2015
Location: Grapevine, Tx
Posts: 5,633
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Quote:
Originally Posted by AussieRv
Appreciate everyone's feedback. I purchased Pennzoil 550038221 Platinum 5W-30 Full Synthetic on Amazon and it was well priced. Will give it a go and wont worry about changing it for 3000 miles.
If I had got to the replies earlier, I say I would have not gone the synthetic route.
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You can easily go 5000 miles between oil changes. Especially with synthetic.
Synthetic is not a waste of money. Buy it at Walmart.
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2004 Fleetwood Southwind 32VS W20 - SOLD!
ReadyBrute Elite towing a 2017 Ford Edge Sport
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