Recent Topics
25% off on Autogeek - Today Only
by SatinSilver
19 minutes 32 seconds ago
Delo, Rotella or M1EP for all 4-cycles?
by nthach
20 minutes 20 seconds ago
Walmart 2 Good Deals and 1 Not So Good
by TheLawnRanger
Today at 11:09 AM
2015 Cruze 1.4T "jerk" at idle in drive
by 2James1
Today at 10:57 AM
by urrlord
Today at 10:47 AM
Rotors already shot on our F-150 Ecoboost. 40k.
by Blaze
Today at 10:04 AM
Broken or Slipped Belt
by ET16
Today at 09:59 AM
#15 Texaco
by PJantzen
Today at 08:56 AM
Yellow plus red
by wsteveg
Today at 07:54 AM
High Milage Oils on Low Milage Engines
Today at 07:50 AM
Engine oil question
by tung
Today at 07:20 AM
ATF flush or D&F
by ugabulldog
Today at 06:30 AM
Hyundai and Quaker State 5W30 A5
by skyactiv
Today at 05:14 AM
335i BMW Rear Bearing: DIY?
by antonmnster
Yesterday at 10:39 PM
Noise on cold start
by Spetz
Yesterday at 09:23 PM
by JohnnyJohnson
Yesterday at 09:10 PM
What is the longest you have had a car battery las
by wtd
Yesterday at 09:00 PM
clicking noise front driver side
by tookien
Yesterday at 08:57 PM
FRAM Ultra XG7317 at 10K miles cut open
by crazy_raccoon
Yesterday at 08:45 PM
Amsoil SS 0w-30 1.4L Tur 2014 Chevy Cruz 20k OCI
by SubieBlue
Yesterday at 08:42 PM
Newest Members
99SK04GTX, jasonjossens4231, Eneos1, tung, spacekiller67
65511 Registered Users
Who's Online
70 registered (aquariuscsm, Ben Boyle, 2009Edge, Billbert, ad244, 6 invisible), 1599 Guests and 37 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
65511 Members
67 Forums
287316 Topics
4793250 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Topic Options
#4703705 - 03/22/18 09:25 PM Few oil ?
Camprunner Offline

Registered: 02/19/08
Posts: 1037
Loc: MA.
Just a few questions ..... Does excessive idling cause oil to get diluted with fuel? And second why do some direct injected engines have a tendency to dilute the oil with fuel? What about a DI motor makes it prone to fuel dilution?

#4703714 - 03/22/18 09:39 PM Re: Few oil ? [Re: Camprunner]
SubieRubyRoo Offline

Registered: 05/14/12
Posts: 1232
Loc: Winchester, Indiana
1. Yes, in almost all cases. Insufficient oil temps prevent the fuel from evaporating and getting sucked out through PCV. 2. Injection pressures can cause fuel to leak past the combustion rings and contaminate the oil.

Interestingly, even on high diluters like the Ford EcoBoost engines, there have not been the catastrophic results predicted by people who are shouting from the rooftops about fuel dilution. It appears if you go by the OLM or sensible OCIs, fuel dilution is not the death sentence that old logic would have you believe.

#4704071 - 03/23/18 09:54 AM Re: Few oil ? [Re: Camprunner]
BrocLuno Offline

Registered: 09/06/15
Posts: 5621
Loc: Kalifornia Kollective
Fuel dilution is just an active form of "Solvent Refining" like good old Grp I oils. If there is not much to create new oils from the initial fill (?), there should not be to much issue other than grade/viscosity loss due to thinning ... And we all know that 0W-20's work for many engines, so starting with a 40 should give you a lot of headroom laugh
Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.