Sponsored

Oil/Fuel Dilution Concerns...

Between oil changes, does your engine oil and level:

  • Non-Hybrid: Remains at the full mark

    Votes: 8 57.1%
  • Hybrid MAX: Remains at the full mark

    Votes: 2 14.3%
  • Non-Hybrid: Oil level increases over time

    Votes: 0 0.0%
  • Hybrid MAX: Oil level increases over time

    Votes: 2 14.3%
  • Non-Hybrid: Fuel smell on dipstick/oil

    Votes: 0 0.0%
  • Hybrid MAX: Fuel smell on dispstick/oil

    Votes: 3 21.4%
  • Non-Hybrid: NO fuel smell on dispstick/oil

    Votes: 3 21.4%
  • Hybdrid MAX: NO fuel smell on dipstick/oil

    Votes: 2 14.3%

  • Total voters
    14

Franko Manini

Trailhunter
Well-known member
First Name
Frank
Joined
Jul 8, 2024
Threads
10
Messages
108
Reaction score
143
Location
Victoria, BC CANADA
Vehicle(s)
2024 Tacoma Trailhunter - 6' Bed - Bronze Oxide
I ran pennzoil ultra platinum 5w30 this summer. Only thing I noticed was a quieter engine. Back to pennzoil up 0w20 for the winter.
I think that's reasonable, especially if you don't have a fuel dilution issue. See my reply to @MustardTiger for more detail.
Sponsored

 

Franko Manini

Trailhunter
Well-known member
First Name
Frank
Joined
Jul 8, 2024
Threads
10
Messages
108
Reaction score
143
Location
Victoria, BC CANADA
Vehicle(s)
2024 Tacoma Trailhunter - 6' Bed - Bronze Oxide
Here is my last two changes. Notice the first change was 396 miles, column to the right. Fuel dilution much better and contributed to proper driving to seat the rings.

Screenshot_20251114_134011_Samsung Notes.webp
Tim, you're 100% correct. fuel dilution will be high until the rings seat properly. with only 0.6% fuel in oil after 2700 miles I think you will probably be just fine going forward unless your driving habits or environment change. That can also influence the results.

What did you change in your driving habits during the break-in period?
 

TimC.

TRD Sport
Member
First Name
Tim
Joined
Jul 1, 2025
Threads
2
Messages
21
Reaction score
41
Location
Ridgeway, VA
Vehicle(s)
2024 Toyota Tacoma
After the first 396 miles I conducted multiple dyno simulations driving in manual up hill and full rpm red line. You must be smooth on the throttle just as if you were in the dyno room. Frequency was 2-3 times per week until the 2700 mile mark. I let oil analysis determine when I stop this. I know my piston rings are sealing quit nicely now.
 
OP
OP
MustardTiger

MustardTiger

TRD Off-Road Premium
Well-known member
Joined
Nov 13, 2024
Threads
8
Messages
157
Reaction score
105
Location
Canada
Vehicle(s)
TacoMAX/SDuty/Dmax
Checked my oil temperatures while driving highway yesterday. After 20 mins it settled on about 198-200f. Doing some hard pulls from 3k-redline, in 4th, up some grades, I got it to 210f. But cruising speed it’s kept close to 200f. Ambient temps were 39f.

So in reality then, even at highway driving, any fuel in the oil will barely begin to evaporate at those oil temps. I’ll be curious to see the engine oil temps when it’s -30c
Sponsored

 
 






Top