Lancer GLXI 1992

Hi to everyone. Sorry for my bad English.
This is my Mitsubushi Lancer GLXI 1992,injection, 1.5l petrol / LPG 90hp, 410000km till now.
This is my daily driver. The original color was Brown. I enjoy driving this car.
Consumption LPG is 7-8l on open roads, 10l in city.
Max speed is 170km/h. Wheels 185/60/14.
There is no problem to hit red area in RPM in first three gears.
Of the investments I had : repair of alternator, repair starter, new fuel pump, new front selfventilated discs, new Conical bearings on all wheels,new kayaba shock absorbers,new ends of steering wheel.
Engine spends about 0.5 l of oil on 10000km.
I use Motul semi synthetic oil, changing on 8-10000km with air and oil filters.
Need to fix rust above the back wheels and on roof. After 26 years thats normal.