First I want to thank everyone for their opinion, it's very helpful! With what has been said I'm going to check the injectors via the computer and see what the LTFT and STFT are for the injectors, long-term and short term fuel trims. I did check them a couple months ago (during the current lab results) and they were maybe 1%! But I know things can change.
With what
@OVERKILL, you said about the fuel dilution, yes it cannot be denied. Over many oils this oil thins out because of that, I believe that. If it gets over 4 months in the engine then it starts to thin out, no matter what viscosity is used. The big question is, what is "normal"? I know nothing is perfect and I agree with
@Artem if I have even 1-2 or 2-3% dilution and the injectors check out normal then I can't be freaking out over it, since the oil DID protect the engine from wear. I'm one who would love to be perfect but on a 27 year old engine, how perfect can it be? And maybe it's just the way it is. I did look up other Civic's from my era here on BITOG and they were all doing the same thing!
@himemsys you're correct, I kept thinking it was 3 months but it's 6 months or 3750miles is what the severe schedule is. One time in 2020 (we all know why) I ended going a year before I changed the oil, that was the old Magnatec recipe and it did great.. We all know how good the old Magnatec recipe was! But I'll have to find something else now. I also appreciate your comments on the possibility of 5w20.
To update everyone speaking of 5w20.. I had the lab re-test the viscosity and yup they were off.. it is 8.86 cSt!! Not 8.14.. now it did thin out but not as much as previously thought. So that means the flashpoint isn't as low as they said. To
@OVERKILL I agree with a different lab and have looked up Amsoil's Oil Analyzers which uses Polaris. They do gas chromatography and if I'm going to get into the details about fuel dilution, I better have the facts! Great point! So that's the next stop, next time.
@Bellavita thanks for the words of encouragement! I know it might be "Average" but you're right, trying to be perfect and yes not even thankful for the results I have! I've been trying to take care of this car, it's a project of restoration and you're right, the results are not bad!
@Furious thanks for the QS suggestion, I'll look into it. And doesn't look like Supertech mis-labelled anything.. the lab redid the testing and the viscosity is much closer to 5w30 at 8.86. It might be a good oil but for this Civic engine it doesn't look like it resisted the fuel dilution..
Also.. looking back at the results over time There was fuel dilution even after I replaced the injectors (new) in 2017! I know that Honda had recalled this computer (ecu) over emissions law violations the EPA caught them doing. The ECU was actually programmed by Honda NOT to throw a check engine light to make themselves look great. EPA caught them and forced them to obey the law. The result? A new ecu was produced. Now why this car never got it is beyond me.. But I have a new, old stock ECU that I will be installing.. (don't worry the capacitors will be replaced because age is a factor) Because if the ecu is bad, how can I believe anything it reports via the OBD2 scanner? And the ecu controls the injectors.. if it is showing fuel dilution even after the new injectors are installed then doesn't hurt to think the ecu isn't doing something right.
Just a theory.. It'll be interesting to see the STFT and LTFT with the old and new ecu..