1.9% fuel.
Yes minor. Wear numbers look low. TBN fine. And yes near 2% fuel, diluted, naturally lowers viscosity.
CX5 4900 miles Amsoil OE
- Thread starter Propflux01
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Yes minor. Wear numbers look low. TBN fine. And yes near 2% fuel, diluted, naturally lowers viscosity.
Propflux01
$100 Site Donor 2025
But wouldn’t that viscosity drop be flagged normally despite the apparent lack of wear?
With that dilution, perhaps moving to a 0/5w-40 so it stays within the mfg 5w-30 requirements?
Not overly concerning- this why the gave it a 1, rather than a zero
Or a 10W-30 first
wow ONLY 1.9% fuel dilution on a direct injection engine? Mazda really tuned that properly! wow.. that's great. 
and the 8.8 viscosity? Depends on where you started when it was new.. most used oil I've seen always lowers in viscosity as it's used. It's why I like to start with a little higher (within grade) viscosity when new. Especially for a direct injection engine.
@Propflux01 what was the mix of highway and city miles on this interval?
and the 8.8 viscosity? Depends on where you started when it was new.. most used oil I've seen always lowers in viscosity as it's used. It's why I like to start with a little higher (within grade) viscosity when new. Especially for a direct injection engine.
@Propflux01 what was the mix of highway and city miles on this interval?
@Propflux01 what was the mix of highway and city miles on this oil change interval?
Propflux01
$100 Site Donor 2025
Approx 60% 2-laned mild hilly curvy road, 20% city, and 20% interstate travel. As for when it was new, whatever Amsoil O.E. 5w-30 specs out as.
doesn't sound like a lot of stop/go traffic for the direct injection to dilute a lot of fuel. I'm very impressed that it was only 1.9% dilution! that's port injected type numbers!! very good! thanks for the info about the driving mix and the UOA update!
Propflux01
$100 Site Donor 2025
I try not to city drive it much, and if I do, it gets a highway run. The 60% 2-lane is my work route. It’s @bout 25 miles each way.doesn't sound like a lot of stop/go traffic for the direct injection to dilute a lot of fuel. I'm very impressed that it was only 1.9% dilution! that's port injected type numbers!! very good! thanks for the info about the driving mix and the UOA update!
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