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#4581577 - 11/22/17 04:32 AM Honda CRV 100k too frequent synthetic change
mi3grls Offline

Registered: 11/21/17
Posts: 2
Loc: AL
Hi. Purchasing a used 2008 crv EX 110k. Have no idea oil they used. I Read in this forum about switching to synthetic and some have stated about miles between changes etc and have hinted changing it too frequently can be bad. I am a 5month or 5k on synthetic and usually hit 5months first. Is this bad in general and bad for this crv? How should I switch over? Thanks

Edited by mi3grls (11/22/17 04:33 AM)

#4581579 - 11/22/17 04:43 AM Re: Honda CRV 100k too frequent synthetic change [Re: mi3grls]
KL31 Offline

Registered: 06/03/16
Posts: 532
Loc: South OZ
I'd go 7-10k miles or 12 months instead if you're using a full synthetic. After seeing many UOA's here, it seems that time running is as important as miles. If you're doing only city then it may be beneficial to change every 6k miles or 6-12months. But highway miles are easy on oil.
1995 MX-3 - KLZE swapped
Shell Helix Ultra 5W40
Wix 51356

#4581592 - 11/22/17 05:17 AM Re: Honda CRV 100k too frequent synthetic change [Re: mi3grls]
Vladiator Online   content

Registered: 01/04/16
Posts: 700
Loc: NC
Frequent oil changes are good for the vehicle. You will never kill an engine with frequent oil changes. You will however kill it with stretching the Oil Change Interval beyond its capabilities.

Based on this I would change the oil and filter every 12 months or 7500 miles, whichever comes first.

BUT since you have no previous maintenance history - I would do two 3500 mile oil changes first to flush out whatever is in there. From there - if the oil comes out relatively clean, then switch to 7.5K mile OCI. If the oil comes out pitch black after 3500 miles - then do a few more short oil changes until the oil is relatively clean coming out of the oil pan. Either way change the oil every 12 months at most.
And do not forget about Transmission fluid, and transfer case & differential fluid (if AWD), and other essential fluids (coolant, powersteering, etc.)
Good luck with the new-to-you vehicle!

Best regards,

#4581610 - 11/22/17 05:46 AM Re: Honda CRV 100k too frequent synthetic change [Re: mi3grls]
bugeye Offline

Registered: 04/10/15
Posts: 65
Loc: Pennsylvania
Good advice from Vlad. Be sure to check the oil level frequently keeping a record of any additions.

#4581623 - 11/22/17 06:07 AM Re: Honda CRV 100k too frequent synthetic change [Re: mi3grls]
SilverFusion2010 Offline

Registered: 06/29/11
Posts: 1488
Loc: Crawfordville FL
What Vlad said
2010 Ford Fusion SE 3.0L V6, 175k miles M1 AFE 0w-20

#4581632 - 11/22/17 06:26 AM Re: Honda CRV 100k too frequent synthetic change [Re: mi3grls]
mi3grls Offline

Registered: 11/21/17
Posts: 2
Loc: AL
Appreciate the input and never thought of the short change and evaluate method. First time buying a used with this many miles, but with a maintained honda, a 108K is just stretching its legs on these 4 bangers.
I was always a 3 or 3 on dino, 4 or 4 on blend, 5 or 5 on synthetic. That'll be a very difficult habit to break as I am a drive until the doors fall off guy and that has pretty much happened.

I will be changing tranny, PS, Brake, filters, and all the others this weekend too. Start my maintenance guide from scratch.

I use mobil1 5w20 in 07 odyssey and I think this CRV takes the same, so it would be nice to get them on the same bloodline. Will definitely keep an eye on the oil level as I heard some discrepancy on what the "real" level is on this thing during a change and I am not sure what its appetite is yet.

Thank you. Gene

#4581633 - 11/22/17 06:28 AM Re: Honda CRV 100k too frequent synthetic change [Re: SilverFusion2010]
StevieC Offline

Registered: 08/21/08
Posts: 17116
Loc: Ontario, Canada
Originally Posted By: SilverFusion2010
What Vlad said

'15 Dodge Journey - 90,000 KM's - SSO 5w20
'06 Hyundai Santa Fe - 535,000km - SSO 0w30 (R.I.P)

#4581638 - 11/22/17 06:34 AM Re: Honda CRV 100k too frequent synthetic change [Re: mi3grls]
Cujet Offline

Registered: 02/15/03
Posts: 6854
Loc: Jupiter, Florida
I have a simple answer. Change with quality synthetic every 5000 miles.

At 105,000 do an oil change, at 110,000 do an oil change at 115,000 etc. Don't worry about the calendar time. It's a frequent enough schedule to help remove dino oil deposits, before the oil becomes too contaminated.

#4581669 - 11/22/17 07:46 AM Re: Honda CRV 100k too frequent synthetic change [Re: mi3grls]
fenixguy Offline

Registered: 02/08/17
Posts: 306
Loc: NC
I have the exact same car and change full synthetic every 5,000 miles. I have no evidence to back up if that's a good interval or not, but it works for me. It certainly won't hurt the car whatsoever. I also usually run a Fram Ultra for 2 intervals, or 10,000 miles. I'm sure that K24 would do perfectly fine on dino at 5,000 mile intervals as well.

If it were me, I'd do the 3x drain and fill of the trans and then 30,000 miles intervals. Change the rear diff fluid with Honda Dual Pump II. There is no transfer case.
'16 Frontier SV 4x4-PP/Nissan OEM
'08 CR-V EX AWD-Valvoline Syn MaxLife/Fram TG
'01 Civic EX-Valvoline Syn MaxLife/Fram UG
'00 Civic LX-PYB/Fram UG

#4581678 - 11/22/17 08:07 AM Re: Honda CRV 100k too frequent synthetic change [Re: mi3grls]
JustN89 Offline

Registered: 06/27/17
Posts: 300
Loc: DFW
IMO, I would just stick to whatever interval you're comfortable with. If you want cost savings, you can follow fenixguy's filter interval. A Fram Ultra will easily handle two 5k mile OCIs.

#4581682 - 11/22/17 08:16 AM Re: Honda CRV 100k too frequent synthetic change [Re: mi3grls]
circuitsmith Offline

Registered: 12/17/09
Posts: 601
Loc: Wash, DC
Originally Posted By: mi3grls
Purchasing a used 2008 crv EX 110k.

It's also time to check valve clearance, IMHO.
2006 Toyota Matrix 5-sp. 1zz-fe 5000mi/12mo OCI
Any major brand dino 5w-30 on sale

#4581687 - 11/22/17 08:19 AM Re: Honda CRV 100k too frequent synthetic change [Re: mi3grls]
sir1900 Offline

Registered: 03/12/09
Posts: 1553
Loc: Regina, Saskatchewan
I partially agree with Vlad in that the two short intervals to flush out whatever is in there is not a bad idea, seeing you do not have any history on its maintenance.

After that, use a quality synthetic and follow the oil life monitor. As you mentioned, at 108k, the engine is just "stretching its legs".

Unless you do not plan on putting many miles on your CRV, there isn't a compelling reason to disregard the OLM.
2015 Infiniti Q50
PP 5W-30 + Baldwin B1402

2015 Nissan Murano
Mobil1 AFE 0W-20 + FRAM XG6607

#4581736 - 11/22/17 09:44 AM Re: Honda CRV 100k too frequent synthetic change [Re: mi3grls]
FermeLaPorte Offline

Registered: 07/25/17
Posts: 374
Loc: Texas (south)
I have a Japanese 4-cyl engine. I change it depending on my use. If during an OcI I did mainly city but I'm going to do 5k in less than 3 months, I change it at Around 4k-5k. If I did mainly highway, Like now I just did 3k in less than 2 weeks, I change it at 7k because I mainly do it at @90mph/4.5k RPMs. I recommend 0w-40 oil on these small japanese engines
Always Mobil 1
2014 1.6L Nissan Versa Sedan, 5 spd, 5k OCI.
2011 3.5L Chevrolet Impala, Automatic, 5k OCI.

#4581823 - 11/22/17 11:36 AM Re: Honda CRV 100k too frequent synthetic change [Re: mi3grls]
ARCOgraphite Offline

Registered: 05/17/09
Posts: 11746
Loc: N.H, U.S.A.
You are likely putting in a premium mineral oil not a synthetic if you bought the stuff Stateside. In The U.S. Fully synthetic oil is an Advertising term not a technical term and it means (near) synthetic oil-like performance.

That said I would use a premium oil like QSUD or Shell Synthetic.

That engine doesn't likely need a real synthetic.
2014 Nissan Rogue S CVT, OC#9 41392mi-QSUD10W30 + M110A CHAMP Filter; 2017 Subaru Crosstrek CVT OC#2 ?? mi-SOA/Idemitsu 0w20 + SOA Filter

#4581830 - 11/22/17 11:43 AM Re: Honda CRV 100k too frequent synthetic change [Re: ARCOgraphite]
Kira Online   content

Registered: 08/19/10
Posts: 4778
Loc: Champlain/Hudson Valley
Is the OP's engine known to sludge up?

Good quality conventional oils are great oils but the suggestion to use 0W-40 (Mobil1 ? ) might be a good one.

It's a real PAO synthetic and might be better come the Summer heat. People here say it cleans well.

I'd love access to a fiber optic scope and look well under the valve cover.

OP: When you decide to do the plugs do a compression check.

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