planning to use Liqui Moly engine oil in our Swift after 5000km checkup.
Got 2 choices, please tell me which one is best suitable;
1) Synthoil high tech 5w-40// API SM/CF 4,500 Pkr for 4 litres
2) Liechtlauf special AA 5w-30(special oil for japanese/asian cars) API SN, ILSAC GF-5. Price not confirmed yet.
And we drive about 1300km per month, and this oil is meant to be changed after 10,000km, so it is safe to keep it in the engine for 4-5 months? 
Done 480km on 3rd tank ( auto-stop at 36 litres) and still got 2 bars left before reserve kicks in:P
Isn't 2,800 rpm @ 100kmp/h a bit high? expected it to be at least 2,500 rpm 