Which Engine Oil Suitable for Toyota Prius 2007, 1.5

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Which Engine Oil Suitable for Toyota Prius 2007, 1.5

AoA.
Respected members,
I bought Toyota Prius 2007 2nd gen, which has already been driven to 196,000 km. I asked the previous owner about the change of oil and which sort of oil is used in this car but he did not respond to me.
I owned Lancer 2005 and I used a Havoline 20w50 in it after every 4000 km traveling. I contacted a local technician and he told me to use the same oil, which I used in my previous car. But the car ran heavily and after 2500 km, the engine of the car reduced about 250 ml, I contacted another mechanic and he recommended some other oil. With the use of newly recommended oil, the car has become light, and the fuel average has also been improved from 20 to 28 km / l and now it has been reduced to 250 ml after 2000 km.
The hybrid battery has gone week after three weeks and it needs to be replaced.
I want to know if this decrease is the cause of the extra load on the engine. Please suggest to me which oil grade should be suitable for it.

Sajid Khan asked on 17 Dec 2022 16:26:43 pm

1 Answer