2018-2019 Buying an used car

bought Mazda 6 2.0i 2010

Searching a naturally aspirated engine

gasoline direct injection (GDI), also known as petrol direct injection, direct petrol injection, spark-ignited direct injection (SIDI) and fuel-stratified injection (FSI).
variable valve timing (VVT) is the process of altering the timing of a valve lift event, and is often used to improve performance, fuel economy or emissions.
- can be used with both direct and indirect injection
best would be to find a indirect injection engine, like on Mazda 6 GH 2.0 pre-facelift (2008-2010) and all Mazda 6 GH 1.8 (2008-2012).
VTi (Valve Timing injection) engines created by PSA Peugeot Citroën and BMW Group uses indirect injection
- there are 2 variants, 1.4 with 95 bhp and 1.6 with 115bhp
MIVEC is the brand name of a variable valve timing (VVT) engine technology developed by Mitsubishi Motors
Honda VTEC ..
Ford TI-VCT, non GDI
PM (particulate matter) is produced only by engines with direct injection
EURO 6
- it is achived basically only with direct injection with very few exceptions
- Toyota has some small 1.33 MPI EURO 6 engines
EURO 5
- most engines are designed with direct injection,
- few exceptions for >1.6, like Mazda MZR 1.8i
- easier to find for small engines, <1.4
EURO 4
- many engines can be found with indirect injection
- but many use with direct injection, think about VW/Audi FSI

1.8i 88 kW - unchanged
- KFZ Steuer 524E (44E/mo)
2.0i 114 kW - DISI = Direct Injection Spark Ignition
- Benzindirekteinspritzung gibt sein Debüt im neuen Mazda 6 und ersetzt den bisherigen Zwei-Liter-Motor mit Saugrohreinspritzung
- http://ww2.autoscout24.at/erster-test/mazda-6-facelift/fruehes-facelift/44465/171603/
- https://www.heise.de/autos/artikel/Mazda-6-mit-Facelift-Fahrbericht-mit-neuem-Benziner-994220.html?artikelseite=2
- https://de.wikipedia.org/wiki/Mazda6#6_(Typ_GH,_2008%E2%80%932012)
2.5i 125 kW - unchanged
- KFZ Steuer 863E (72E/mo)

all petrol engines are with indirect injection
- Motor codes M 166 E xx (E = Saugrohreinspritzung, xx = engine size in deciliter)

MPI engines use a Kompressor, while GDI engines a turbocharger
C 180 Kompressor BlueEFFICIENCY 2008 - 2010 - 115 kW
- from 2009 this engine was produced with gasoline direct injection
C 180 Kompressor 2007 - 2008 - 115 kW
C 200 Kompressor 2007 - 2010 - 135 kW
- from 2009 this engine was produced with gasoline direct injection and turbocharger
C 250 was produced after 2009, only with gasoline direct injection
C 230 is a V6 engine with indirct injection - 150 kW

E9x series with petrol engines, especially L4 N43, are known to have problems with oil leaks, water pump, cooling..
inline 6 cylinder engines (325i) seems to be the best for car enthusiasts, but quite expesive to own
N43 and N53 use direct injection
N45, N46 and N52 engines use indirect injection
N46 found on pre-2018-facelift 318i 95 kW and 320i 110 kW
N52 found on pre-2018-facelift 330i 190 kW