Hey guys,
I've used this site alot as a reference but never as a registered member.
Anyways, I have a 1995 subaru legacy 2.2 liter. It has 270,000 miles and climbing and has ran like a top since I bought it a year ago.
Anyways, the vehicle calls for a 5/30 or 10/30 weight of oil. I live on the Oregon Coast and it's very moderate here, never more than 80 degress in summer or less than 30 degrees in winter.
Anyways, I bought it about 15k miles ago and have changed the oil 5 times since owning it. Right at 3k every time.
Anyways, the previous owner used 10/40 so I just continued using that weight. Castrol High mileage 10/40 for the first 3 oil changes, then switched to Mobil 1 full synthetic High mileage 10/40 for the other two. (I'm a firm believer in Mobil 1). Anyways, I know 10/40 is a but heavier than recommended, but I figured it can't hurt with almost 300k miles on it.
Anyways, my question is: am I causing more harm than good using this heavy of an oil? Does it matter? The car amazingly (by some divine miracle) uses only about 1 quart of oil in 3000 miles, which is very little in my experience on a high mileage car, especially a subaru.
What do you guys think? Should I switch to a lighter oil? Am I putting my oil pump through needless torture? How much heavier is 10/40 compared to 5/30 really?
I feel like since it's been working fine might as well keep it, but am scared about the long term effects.
Also, I drive 7 miles Highway to work each way, (15 miles round trip) and always let it warm up for 5 plus minutes every morning.
I've used this site alot as a reference but never as a registered member.
Anyways, I have a 1995 subaru legacy 2.2 liter. It has 270,000 miles and climbing and has ran like a top since I bought it a year ago.
Anyways, the vehicle calls for a 5/30 or 10/30 weight of oil. I live on the Oregon Coast and it's very moderate here, never more than 80 degress in summer or less than 30 degrees in winter.
Anyways, I bought it about 15k miles ago and have changed the oil 5 times since owning it. Right at 3k every time.
Anyways, the previous owner used 10/40 so I just continued using that weight. Castrol High mileage 10/40 for the first 3 oil changes, then switched to Mobil 1 full synthetic High mileage 10/40 for the other two. (I'm a firm believer in Mobil 1). Anyways, I know 10/40 is a but heavier than recommended, but I figured it can't hurt with almost 300k miles on it.
Anyways, my question is: am I causing more harm than good using this heavy of an oil? Does it matter? The car amazingly (by some divine miracle) uses only about 1 quart of oil in 3000 miles, which is very little in my experience on a high mileage car, especially a subaru.
What do you guys think? Should I switch to a lighter oil? Am I putting my oil pump through needless torture? How much heavier is 10/40 compared to 5/30 really?
I feel like since it's been working fine might as well keep it, but am scared about the long term effects.
Also, I drive 7 miles Highway to work each way, (15 miles round trip) and always let it warm up for 5 plus minutes every morning.