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Best oil for me #4661724
02/10/18 10:17 AM
02/10/18 10:17 AM
Joined: Mar 2007
Posts: 42
Alabama
vincent714028 Offline OP
vincent714028  Offline OP
Joined: Mar 2007
Posts: 42
Alabama
I am a delivery driver. There are lots of short trips and city traffic. I commute to the city 40 miles on the highway so there is a 50/50 mix of city/highway miles. I use a 2006 Dodge Grand Caravan SXT 3.8L V6. This van has 187,500 miles on it.

It leaks oil at multiple locations. I am not fixing this problem. I mention it as a point to note in my oil selection. I understand that 2 quarts of top off between 5,000 mile oil change intervals is a lot and adds to my oil cost. I would have to tear down the engine to fix all of the leaks. I would rather spend time and money on a new vehicle at $1500 instead.

I keep it maintained other than the oil leaks. I replaced the antifreeze and auto trans fluid within the last 3,000 miles.

I use Mobil1 5W20 High Mileage Synthetic at the moment. Cost is a huge problem at each oil change. I will continue to use this oil if it is the most cost efficient one for me to use. However, I am researching whether a switch to conventional oil will reduce my oil cost efficiency considering that the reduction in up front cost also reduces the gas mileage benefit of using synthetic oil.

What is the formula for this cost efficiency calculation between synthetic oil, conventional oil, and gas mileage? Should I use conventional oil or synthetic?


2015 Ford Fiesta SE 1.6L I4 51,000 miles
Motorcraft 5W-20 Semi-synthetic oil
Motorcraft oil filter fl-910s
Re: Best oil for me [Re: vincent714028] #4661727
02/10/18 10:21 AM
02/10/18 10:21 AM
Joined: Aug 2003
Posts: 3,608
lllinois
salesrep Offline
salesrep  Offline
Joined: Aug 2003
Posts: 3,608
lllinois
Conventional and jump to a 5-30. Your mpg will only go down slightly with your driving habits.


High quality Specialized Lubricants pay for themselves!
Re: Best oil for me [Re: vincent714028] #4661730
02/10/18 10:26 AM
02/10/18 10:26 AM
Joined: Dec 2011
Posts: 4,755
North Carolina
rooflessVW Offline
rooflessVW  Offline
Joined: Dec 2011
Posts: 4,755
North Carolina
I'd pick up a 5 gallon pail of Rotella T4 10W-30. It works out to about $3/qt and will handle just about anything you can throw at it.


"Zed's dead baby, Zed's dead."
Re: Best oil for me [Re: vincent714028] #4661731
02/10/18 10:29 AM
02/10/18 10:29 AM
Joined: Sep 2009
Posts: 2,161
Deep in the heart of Jersey
BigCahuna Offline
BigCahuna  Offline
Joined: Sep 2009
Posts: 2,161
Deep in the heart of Jersey
I'd jump to a 15/40 wt diesel oil . Thicker oil leaks less and is cheap. you won't be able to any difference in mileage that's worth mentioning.,,,

Re: Best oil for me [Re: vincent714028] #4661750
02/10/18 10:43 AM
02/10/18 10:43 AM
Joined: Sep 2015
Posts: 981
PENNSYLVANIA
JeepWJ19 Offline
JeepWJ19  Offline
Joined: Sep 2015
Posts: 981
PENNSYLVANIA
I'm gonna have to agree with bumping it to a 5w30. But try Pennzoil High Mileage 5w30.


2002 Jeep WJ 4.0 | Mobil 1 HM 5w30 |
TG8A | 2.5" lift | 148k miles

Software Engineer :]
Re: Best oil for me [Re: vincent714028] #4661757
02/10/18 10:48 AM
02/10/18 10:48 AM
Joined: Mar 2017
Posts: 5,480
Soviet State of Washington
PimTac Online content
PimTac  Online Content
Joined: Mar 2017
Posts: 5,480
Soviet State of Washington
Any major brand of 5w-30 high mileage oil will do.


2017 Mazda CX-5 Grand Touring

Valvoline Advanced Synthetic 0w20
Mobil 1 M108A EP filter

Re: Best oil for me [Re: vincent714028] #4661763
02/10/18 10:51 AM
02/10/18 10:51 AM
Joined: Sep 2009
Posts: 16,026
OH
fdcg27 Offline
fdcg27  Offline
Joined: Sep 2009
Posts: 16,026
OH
M1 HM in the 10W-30 grade.
This would likely reduce leaks/consumption and shouldn't cause any measurable decline in fuel economy.
You can get four jugs cheaply each year by taking advantage of Mobil's spring and fall MIRs.
If I had an engine with known leak/consumption problems in a place where it never gets really cold, I don't think I'd use a 5W-20 grade oil in it.
The fuel economy benefits of a lower HTHS oil are real and measurable, but probably not noticeable off a test dyno.


17 Forester 18K VME 0W-20
12 Accord LX 92K PP 5W-20
09 Forester 95K M1HM 10W-30
01 Focus ZX3 118K PP 5W-20
96 Accord LX 104K T5 10W-30
95 318i
Re: Best oil for me [Re: vincent714028] #4661764
02/10/18 10:52 AM
02/10/18 10:52 AM
Joined: Apr 2016
Posts: 1,185
Campbellsville, KY
Alex_V Offline
Alex_V  Offline
Joined: Apr 2016
Posts: 1,185
Campbellsville, KY
Maxlife red bottle 5w30. A quart every 2,500 is mentionable but far from what it could be on the 3.8.


I like Chevy and Valvoline.

'13 Cruze, 1.4T, 113K
'85 GMC C3500, 454, 130K
'82 Mercedes 300CD, OM617 turbo, 169K
'67 Suburban, 350, 331K
Re: Best oil for me [Re: vincent714028] #4661775
02/10/18 11:00 AM
02/10/18 11:00 AM
Joined: Oct 2014
Posts: 11,857
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 11,857
Idaho
There is really no reason to use M1 and change it at 5,000 mile intervals.


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: Best oil for me [Re: vincent714028] #4661781
02/10/18 11:02 AM
02/10/18 11:02 AM
Joined: Mar 2007
Posts: 42
Alabama
vincent714028 Offline OP
vincent714028  Offline OP
Joined: Mar 2007
Posts: 42
Alabama
I am focused on cost as my main priority. That's why I want to find a formula to be certain of my decision. I am looking away from synthetic and toward conventional types of oil since the initial cost is lower.


2015 Ford Fiesta SE 1.6L I4 51,000 miles
Motorcraft 5W-20 Semi-synthetic oil
Motorcraft oil filter fl-910s
Re: Best oil for me [Re: vincent714028] #4661791
02/10/18 11:08 AM
02/10/18 11:08 AM
Joined: Dec 2006
Posts: 18,643
Dallas,Tx USA
aquariuscsm Online content
aquariuscsm  Online Content
Joined: Dec 2006
Posts: 18,643
Dallas,Tx USA
I was curious about the oem spec weight for your van and it does look like it's 5W20. Maybe try another 5W20 high mileage oil. Pennzoil High Mileage,Max Life,GTX High Mileage,etc. You said that you want to move away from synthetics,Pennzoil High Mileage is a conventional high mileage oil and is an excellent oil.


1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Quaker State Ultimate Durability 10W30
2012 Honda Accord Coupe EX-L 2.4,auto,San Marino Red
Quaker State Ultimate Durability 5W20

Re: Best oil for me [Re: vincent714028] #4661795
02/10/18 11:10 AM
02/10/18 11:10 AM
Joined: Jun 2013
Posts: 1,711
Virginia
mattwithcats Offline
mattwithcats  Offline
Joined: Jun 2013
Posts: 1,711
Virginia
Shell Rotella T5 in 10W-30, a good stout inexpensive semi synthetic....


2009 Smart Pure
Pennzoil Platinum Euro 0W-40, Purolator Synthetic PSL 14610, 45 mpg...
185/55R15 General HP tires, "H" speed rated, 44 psi (300 kpa)
Re: Best oil for me [Re: vincent714028] #4661810
02/10/18 11:21 AM
02/10/18 11:21 AM
Joined: Oct 2012
Posts: 307
North Carolina
Egg_Head Offline
Egg_Head  Offline
Joined: Oct 2012
Posts: 307
North Carolina
Does it make sense to invest in an oil filter that will go 10k+ miles and change it at 10-12k miles and just keep topping off with cheapest conventional HM? You are putting 1 qt of oil in every 2500 miles, not sure if your sump is 4, 5 or more quarts, this would be important to understand. Changing oil and filter I presume at 5k means some of the oil you are dumping has been in there 2500 miles or less depending upon top off. You will always be chasing the fact that newer oil may be dumped but this is something to consider. Maybe folks here smarter than I can work out a formulation to prove it right or wrong.

Last edited by Egg_Head; 02/10/18 11:25 AM.

1979 Garelli Rally Sport
2009 Cub Cadet LT1042
2002 BMW 540 M Sport (totaled)
Re: Best oil for me [Re: vincent714028] #4661839
02/10/18 11:52 AM
02/10/18 11:52 AM
Joined: Jan 2016
Posts: 238
Ada county Idaho
MRtv Offline
MRtv  Offline
Joined: Jan 2016
Posts: 238
Ada county Idaho
I'd look at doing cheap oils from Walmart. Conventional Supertech 5w20 or 5w30. For a little more you can get the Castrol GTX ultra clean. I would also consider Supertech High milage or the Castrol High milage or whatever other blend oil is cheap. If your not going to fix it then use whatever inexpensive oil you can. No sense in putting in a premium oil.


2014 Nissan Versa Note 1.6 liter engine. 1997 Ford F150 4x4 4.6 liter engine.
Re: Best oil for me [Re: vincent714028] #4661854
02/10/18 12:07 PM
02/10/18 12:07 PM
Joined: Sep 2015
Posts: 5,868
Kalifornia Kollective
BrocLuno Online content
BrocLuno  Online Content
Joined: Sep 2015
Posts: 5,868
Kalifornia Kollective
In a delivery van you will junk sooner rather than later - SuperTech High Mileage in any grade thicker than a 20 ...

ST HM smile


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
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