Here's the first oil analysis on our 2003 Outback.
I am a firm believer in Redline synthetic oil and synthetic gear lubes. But testing never hurts.
Engine break in was on factory fill 5W-30 oil, new to 3000 mile,
-conventional 5W-30 Valvoline oil from the dealer, 3000 to 5000 miles,
-Redline 5W-30 , 5000 to 10,000 miles
-Redline 5W-40 , 10000 to 18,000 miles
Car driven in Vail,Colorado ......so lots of sustained near wide open throttle up 7% grades at 8000 ft up to 11,600 ft , down to Denver at 5280 ft and back again.
2003 Subaru Outback 4 cyl 5 sp
18000 miles
Oil Change Interval 8000 miles
Make up oil = 0 ( very pleased with zero oil consumption in 8000 miles )
Redline 5W-40
Here are some of the comments from the company that did the use oil analysis:
"No problems showed up in the initial sample from your Suby.
Almost all wear read at or below averages for this type of engine, which is a very good indication of normal wearing parts and especially good since this oil was run longer than average.
Universal averages show normal wear
from the 2.5L after about 5,500 miles on the oil.
Insolubles were low, showing good oil filtration.
At 18,000 total miles, everything looks great. Suggest going 10,000 on the next oil."
I am a firm believer in Redline synthetic oil and synthetic gear lubes. But testing never hurts.
Engine break in was on factory fill 5W-30 oil, new to 3000 mile,
-conventional 5W-30 Valvoline oil from the dealer, 3000 to 5000 miles,
-Redline 5W-30 , 5000 to 10,000 miles
-Redline 5W-40 , 10000 to 18,000 miles
Car driven in Vail,Colorado ......so lots of sustained near wide open throttle up 7% grades at 8000 ft up to 11,600 ft , down to Denver at 5280 ft and back again.
2003 Subaru Outback 4 cyl 5 sp
18000 miles
Oil Change Interval 8000 miles
Make up oil = 0 ( very pleased with zero oil consumption in 8000 miles )
Redline 5W-40
Here are some of the comments from the company that did the use oil analysis:
"No problems showed up in the initial sample from your Suby.
Almost all wear read at or below averages for this type of engine, which is a very good indication of normal wearing parts and especially good since this oil was run longer than average.
Universal averages show normal wear
from the 2.5L after about 5,500 miles on the oil.
Insolubles were low, showing good oil filtration.
At 18,000 total miles, everything looks great. Suggest going 10,000 on the next oil."