I am from Thailand, sorry about my bad english.
I doubting about this, changing oil interval, kind and Viscosity of oil.
Which choice is better, if main purpose is Engine protection ?
1. Fully Synthetic @ 8,000km/1-1.5yr(s) vs Semi Syntheic @ 5,000km/6-9months changings.
2. xW-40 vs xW-30 (Only xW-30 will pass the ILSAC GF-5 approved, suitable for E85, and have E85 Emultion Retension ability.)
Usage conditions:
- Not much use car, 0.5-2 times a week, ~yr (~4349.598 miles/yr).
- Usaually in Bangkok traffic condition, or non-traffic but short distacne - Some time I like to drive fast in traffic, low speed but high rpm (But not more than 5,500rpm). (I am impatient driver, especially in city traffic.)
Car conditions/problems and other:
- D16Y4 A/T Civic EK '96 with 220,000 miles mileages (350,000 km mileages).
- Always use E85 fuel. (So I worry about E85 Emultion Retension)
- Environment Air temp 73~104°F (23~40°C).
- I'm using 5W-40 have some engine oil lost at 6,600 km mileages(count from last changing) (From High level to nearly Low level).
- Some time I smell of burnt Engine Oil when use high rpm.
Main purpose is Engine protection.
First question, I don't know which one is better, but now a day I use 1st method (Fully Synthetic change@ 8,000km/1-1.5yr(s)), at nearly 7,000 km I've found my engine oil's color is look brown to dark-brown.
Second question, now I use 5W-40 because I saw my car have engine oil lost problem. So I think xW-40 is better than xW-30. But after research, I have new worry about E85 Emultion Retension.)
Refs about E85 Emulsion Retension:
https://hrcak.srce.hr/file/92690
https://www.infineuminsight.com/media/1817/6-passenger-car-engine-oil-na.pdf
https://www.infineuminsight.com/media/2027/api-brochure-2018.pdf
https://www.infineuminsight.com/media/1816/5-engine-oil-specifications-na.pdf
http://www.pqiamerica.com/apiserviceclass.htm
http://www.lubrita.com/news/258/671/ILSAC-GF-6-Passenger-Car-Automotive-Specification---LUBRITA/
https://www.motor.com/2019/05/get-ready-gf-6-motor-oil/
I doubting about this, changing oil interval, kind and Viscosity of oil.
Which choice is better, if main purpose is Engine protection ?
1. Fully Synthetic @ 8,000km/1-1.5yr(s) vs Semi Syntheic @ 5,000km/6-9months changings.
2. xW-40 vs xW-30 (Only xW-30 will pass the ILSAC GF-5 approved, suitable for E85, and have E85 Emultion Retension ability.)
Usage conditions:
- Not much use car, 0.5-2 times a week, ~yr (~4349.598 miles/yr).
- Usaually in Bangkok traffic condition, or non-traffic but short distacne - Some time I like to drive fast in traffic, low speed but high rpm (But not more than 5,500rpm). (I am impatient driver, especially in city traffic.)
Car conditions/problems and other:
- D16Y4 A/T Civic EK '96 with 220,000 miles mileages (350,000 km mileages).
- Always use E85 fuel. (So I worry about E85 Emultion Retension)
- Environment Air temp 73~104°F (23~40°C).
- I'm using 5W-40 have some engine oil lost at 6,600 km mileages(count from last changing) (From High level to nearly Low level).
- Some time I smell of burnt Engine Oil when use high rpm.
Main purpose is Engine protection.
First question, I don't know which one is better, but now a day I use 1st method (Fully Synthetic change@ 8,000km/1-1.5yr(s)), at nearly 7,000 km I've found my engine oil's color is look brown to dark-brown.
Second question, now I use 5W-40 because I saw my car have engine oil lost problem. So I think xW-40 is better than xW-30. But after research, I have new worry about E85 Emultion Retension.)
Refs about E85 Emulsion Retension:
https://hrcak.srce.hr/file/92690
https://www.infineuminsight.com/media/1817/6-passenger-car-engine-oil-na.pdf
https://www.infineuminsight.com/media/2027/api-brochure-2018.pdf
https://www.infineuminsight.com/media/1816/5-engine-oil-specifications-na.pdf
http://www.pqiamerica.com/apiserviceclass.htm
http://www.lubrita.com/news/258/671/ILSAC-GF-6-Passenger-Car-Automotive-Specification---LUBRITA/
https://www.motor.com/2019/05/get-ready-gf-6-motor-oil/