What? Seems to be a big disconnect in understanding oiling systems, and the purpose of multi-weight oils.
Last edited:
5w-30 for new Honda 3.5L v6
- Thread starter rbk777
- Start date
Are you well over 80? Multigrades have been out since at least 1957… and in use!
https://bobistheoilguy.com/forums/threads/when-did-multi-viscosity-oils-come-out.295695/post-4859161
Not sure what you're claiming in that statement. And what is the viscosity when the oil is at 100C?
No way fuel evaporates before oil reaches operating temperature. There have been members here with vehicles that are pretty bad fuel diluters, and the oil level never really goes down unless maybe they take it on a very long highway trip.
Well, I drive from work 40min, and I did oil change and send it to lab after 40min drive. Do I need to find job that is 2 hours away
What lab fuel dilution test standard was used? Some are not very accurate. And what was the fuel dilution percentage? What oil viscosity are you using? Would you want to try it with 0W-16?Well, I drive from work 40min, and I did oil change and send it to lab after 40min drive. Do I need to find job that is 2 hours away
What lab fuel dilution test standard was used? Some are not very accurate. And what was the fuel dilution percentage? What oil viscosity are you using? Would you want to try it with 0W-16?
kirkland 5w-30, 3800 miles, Acura RDX 2020
glad I went up in viscosity, 5w-30 now looks lower than 0w-20 thanks to all the fuel dilution. Car get 70% highway miles. Oil changed at 50% of MID.
bobistheoilguy.com
Oil analyzers. Last sample was 5w-30, two before it 0w-20. I am done with 0w-20.
They are telling you right in the UOA comments section that >5% fuel dilution is bad, and can cause increased engine wear. Everything said above is in aliment with what the UOA shows.
Why do you need convincing? 0w20 is used in engines that are more demanding then your vehicle.
They say excessive idling and heavy throttle, but its not, normal driving and 70% highway. You might think its my car only, but there are number of UOA reports from different people that have the same engine 2.0T with 4-5% fuel dilution, so its not just my car.
Yeah, it's a fuel management design issue on certain engines. Can you imagine if it was a short tripper and was using 0W-20 or 0W16? Some bad dilutes will get as high as 20-25% fuel dilution, and the oil level on the dipstick will be WAY above the Full mark. Anyone thinking that's not a big deal and won't cause more wear just don't understand lubrication.
Tensioner is not hydraulic.
It maintains its own pressure.
Host oil does not effect it.
I'd go 5w-30....but your honda warranty might not like it
Manual recommends viscosity and does not require it, and from what I gathered, they mostly care about you changing oil and not the viscosity. I will take that chance. Heck, they might give you troubles because its DIY, so a lot can go wrong if your dealer is bad
You had >5% fuel dilution (my estimate is it was ~9% in your UOA thread) with only 3,800 miles on the car. Can you imagine what the dilution % would be if you ran the OCI to say 7500 or 10000 miles?
Yup. Thats why I went up in viscosity and do shorter OCI. I am disappointed in Honda GDI design.
I feel like with that level of dilution you should see an increase on the stick...did you? I short trip my J35 and live in a colder climate than just about everyone on here and I've never noticed anything worse than a little fuel smell on the dipstick. No increase in level. That being said, I run an Xw-30 because why not give better protection and I know that inherently there is some dilution being GDI, even if it's "normal".
Maybe when its 10% and 0% oil burn, but say some of your oil got burned off and replaced by fuel, then your net change in oil level is close to 0.
That would be pretty obvious when draining and that much oil burn would leave other signs. It burns no more than any other ICE vehicle is expected to due to the nature of the design. Gen 3 VCM isn't known to burn oil anyways, but I do have it disabled regardless.
I did not see any change in level with 5%, I go with UOA as the ultimate measurement.
nah, man you need to be running Mobil 1 0W40 SP
- Joined
- Mar 14, 2023
- Messages
- 206
Agreed, 0w-40 euro formula, fantastic product for the $.
www.machinerylubrication.com
Motor Oils - Fuel Economy vs. Wear
Conventional wisdom states that engine oils that increase fuel economy allow less friction and prolong engine life. The purpose of this article is to challenge conventional wisdom, particula…
www.machinerylubrication.com