|
|
01-23-2019, 01:43 PM
|
#1
|
Junior Member
Join Date: Jan 2019
Posts: 8
|
Synthetic Oil or Conventional Oil?
Three subjects I try to avoid at all cost - politics, religion, and motor oil.
I'll take a chance here and ask about oil. Have a 1989 Foretravel Grand Villa Unihome U280 with about 120,000 miles. Bought it last year so I don't know if it has ever had synthetic in it or not, I have used Sinopec T500 non synthetic for 2 oil changes. So far so good - but I have considered switching to T700 full synthetic oil. My primary interest extending the life of the engine as long as possible. I read claims of better fuel economy, less frequent changes, cooler temp, not as important as engine life, would likely continue to change oil at about 4000 mile intervals. I have been doing some research and can not find a conclusive answer, their are a lot of mixed responses online and I am not sure if this goes as a per vehicle basis. The T500 has been my choice of oil simply because it's basically shell rotella / mobil delvac but without the crazy prices. A lot of you guys may not be familiar with the T500 but since I have multiple diesel engine vehicles and RVs so for 399 a barrel I caved. Thanks Much for any input, almost time to hit the road again!
|
|
|
|
Join the #1 RV Forum Today - It's Totally Free!
iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!
You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!
|
01-23-2019, 01:49 PM
|
#2
|
Senior Member
Forest River Owners Club Ford Super Duty Owner
Join Date: Jul 2012
Location: So Calif
Posts: 3,535
|
I use full synthetic oils in all my vehicles, including our diesel truck. For many reasons.
Lots of good research on www.bobistheoilguy.com website.
Use what you want, what you can afford, and how long you plan to keep it.
__________________
2020 Coachmen Leprechaun 270QB (COA Member)
Jeep Wrangler toad for the dirt
"Well done is better than well said"....Ben Franklin
|
|
|
01-23-2019, 01:57 PM
|
#3
|
Junior Member
Join Date: Jan 2019
Posts: 8
|
What I would do is usually run whatever came with the vehicles until time for the first oil change, then switched to synthetic unless the manual said otherwise on my most recent vehicles but in this instance the car is already so old I am concerned with how this will affect the wear of the engine. I feel like The sludge that has built up over time will often break loose, causing leaks, increased engine wear, or even engine damage due to the sludge blocking oil passages. Older engines also have increased clearances due to wear that synthetics may be too thin
|
|
|
01-23-2019, 02:01 PM
|
#5
|
Junior Member
Join Date: Jan 2019
Posts: 8
|
Is there anyone who has a better understanding of PDS's who can take a look at the two and tell me if there is any other risks I am not considering?
|
|
|
01-23-2019, 02:11 PM
|
#6
|
Senior Member
Join Date: Jul 2014
Posts: 35,441
|
Oil related failures are very rare, even with standard oil, if changed according to schedual.
Lack of oil, overheating, wear on non oiled parts ( rings, valves ) due to dirt ingestion are the killers of engines. Synthetic oil won't prevent that.
Using oil specified by the manufacture will be all you need.
|
|
|
01-23-2019, 02:19 PM
|
#7
|
Senior Member
Join Date: Dec 2017
Location: Sacramento, California
Posts: 1,402
|
I have a 1999 F53 with the v10. I changed to synthetic due to length of my trips. I safely go 5000 miles on an oil change rather than 3000 on conventional oil. USE A GOOD OIL FILTER! Do not use a Fram or similar. That will make a HUGE difference in longevity.
|
|
|
01-23-2019, 02:39 PM
|
#8
|
Senior Member
Outdoors RV Owners Club
Join Date: Dec 2014
Location: Nowhere, now here. Freedom!
Posts: 4,602
|
How will you know if, along with other things that cannot be seen, if your oil is doing a good job and your engine is wearing normally? Oil testing. Otherwise, we're all really just guessing that this or that oil is OK.
https://www.blackstone-labs.com/
But without oil sample testing, use what the engine manufacturer says to use and you should be OK without investing in the higher cost of synthetic oil, unless the engine manufacturer says to use synthetic oil exclusively.
Change it according to the schedule. Maintaining the vehicle according to the schedule, or more often than recommended, is the best way to spend money on longevity first.
__________________
ORV 19B Full Timer from '15 to '20, '14 Ram 2500 Diesel and a GSD. Vancouver, WA
de K7NOL 146.52Mhz Safety? (CLICK ME!)
|
|
|
01-23-2019, 02:41 PM
|
#9
|
Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
|
Cummins doesn't say much about synthetics other than you can't extend the change intervals when using it. I suspect it's due to the suspension of soot which us collected at the same rate for both conventional and synthetic.
__________________
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
|
|
|
01-23-2019, 02:42 PM
|
#10
|
Senior Member
Join Date: Jul 2014
Posts: 35,441
|
Quote:
Originally Posted by Bahamaniac
I have a 1999 F53 with the v10. I changed to synthetic due to length of my trips. I safely go 5000 miles on an oil change rather than 3000 on conventional oil. USE A GOOD OIL FILTER! Do not use a Fram or similar. That will make a HUGE difference in longevity.
|
In 1999 Ford recomended 5000 mile oil changes and conventional oil.
The 3000 mile change suggestion came from oil change places. Marketing at its best.
|
|
|
01-23-2019, 03:00 PM
|
#11
|
Senior Member
Newmar Owners Club
Join Date: Jun 2016
Location: Katy, TX
Posts: 841
|
From me the "Refining Guy" whose company manufactures engine oils. Full synthetic oils are great for gasoline engines as synthetics have much better thermal stability for a much longer period of time that do conventional oils. Viscosity break down over time is why gasoline engine oils "wear out".
For diesel engines Mr. D is spot on. The oil's ability to "absorb" combustion products i.e. carbon (soot), sulfur and nitric oxides, etc. is the limiting factor for diesel engine oils. Synthetic oils and conventional oils have no differences in the amount of combustion products they can absorb thus why Cummins requires the engine oil to be changed after a defined number of miles (12,000 miles max for my Cummins ISB) regardless of oil type. I use Shell Rotella or Valvoline Premium Blue.
__________________
Mike & Cindy in Katy, TX
2016 Newmar Ventana LE 4037
2016 Jeep Wrangler Unlimited Sahara
|
|
|
01-23-2019, 03:43 PM
|
#12
|
Senior Member
Join Date: Nov 2006
Location: Western NY
Posts: 6,150
|
Maybe do a poll and find out how many have worn out an engine using dino?
There are a LOT of OTR trucks that go 1,000,000 mi between rebuilds on Dino oil.
Why go by oil Co recommendations instead of engine mfg?
If Dino was that much better eng mfg should extend warranties like Allison does w syn tranny fluid... but then again they don't get the combustion contaminants...
Ah... there's the answer?
__________________
Don & Marge
'13 Newmar Ventana 3433 - '14 CR-V TOAD
'03 Winnebago Adventurer 31Y - SOLD
|
|
|
01-23-2019, 05:07 PM
|
#13
|
Senior Member
Texas Boomers Club Holiday Rambler Owners Club
Join Date: Jun 2002
Location: What? Like right now? ;-)
Posts: 1,302
|
If you got a gas engine and pulling a load your oil temps are 250+ then you might need a synthetic and an OIL Cooler. But no diesel pusher will likely need them. Just change it at 1yr and 12K mile internals and it will still out live you. And spend at least 60$ on some oil analysis.. At least to get a baseline of the motor. Its better for most big diesels.
__________________
2003 Scepter 40PDBB - Roadmaster RR8S - Cummins ISC350 - purch aug16
|
|
|
01-23-2019, 05:14 PM
|
#14
|
Senior Member
Join Date: Nov 2006
Location: Western NY
Posts: 6,150
|
Quote:
Originally Posted by jimmy braden
If you got a gas engine and pulling a load your oil temps are 250+ then you might need a synthetic and an OIL Cooler. But no diesel pusher will likely need them. Just change it at 1yr and 12K mile internals and it will still out live you. And spend at least 60$ on some oil analysis.. At least to get a baseline of the motor. Its better for most big diesels.
|
BIL towed a horse trailer w a 4 banger gasser and ran 350,000 mi w dino. Just normal changes.
How many ar ed putting more than 350k and need to worry???
Contaminants are the enemy and only way to get rid of them is change frequency.
__________________
Don & Marge
'13 Newmar Ventana 3433 - '14 CR-V TOAD
'03 Winnebago Adventurer 31Y - SOLD
|
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
|