Yeah, I have to change my oil based on time rather than mileage. Sometimes I wonder if I should just use conventional oil but the cost difference overtime is minimal.KuroNekko wrote:I'm pretty sure that the oil change intervals in the owner's manual are for conventional oil. I have not read anything in the owner's manual or elsewhere that calls for synthetic motor oil to be used in the Kizashi.
Pennzoil's official stance on extended OCIs with their synthetic products is this (taken from a dialogue with a Pennzoil rep featured on BITOG):
Question:
Is it Pennzoil Platinum for normal 10k miles OCI and Pennzoil Ultra Platinum for extended OCI up to 15k miles?
Answer:
Pennzoil Platinum[REGISTERED SIGN] Full Synthetic motor oil with PurePlus[TRADE MARK SIGN] Technology and Pennzoil Ultra Platinum[REGISTERED SIGN] Full Synthetic motor oil with PurePlus[TRADE MARK SIGN] Technology are extremely robust formulations, but lubricant marketers do not set oil drain intervals. Drain interval recommendations belong to the engine manufacturers.
I'd say your OCIs are short given the mileage, but your Kizashi is more your 2nd/winter car, right? In that regard, the time may expire before the mileage.
Mine is my daily driver and I drive it at least 30 miles a day, 5 days a week. It also regularly sees stop-and-go traffic and city driving conditions. My OCI is 7500 miles (12,000 km) with synthetic motor oils like Pennzoil Platinum/Ultra, Mobil 1, and the like. My typical burn-off is about 0.5 quarts between OCIs with Pennzoil P/U, but I've burned and added 0.5 quarts already with Mobil 1 and it's only been about 3000 miles since the oil change.
I have non doubt that PP or PU can go the distance on a quality filter. I'm shocked that much M1 has already burned up already. Further proof that not all oils are equal and better oils do make a difference in reality!