Originally Posted By: 440Magnum
Originally Posted By: bluesubie
Are you sticking with the 3,750 mile OCI? If so, then I would definitely go with RTS. If you want to push it past 5k or so, maybe consider the Red Line.
OTOH, I've seen good uoa's on both with extended intervals. The RL uoa was about a year ago on a Stage II or III with a protune. The past couple of Subaru uoa's on RTS have shown less calcium than previous versions, but I don't recall if the magnesium amounts were different. I also seem to recall a couple shearing to a 30 grade.
-Dennis
Not sure I understand the logic here. RTS does *great* with extended drains, it is after all an HDEO. Its got a very high starting TBN, and holds TBN very well. It also holds viscosity well, I just had a recent UOA on a Jeep 4.0 at a tad under 5k miles, and it was still well within the 40-wt range.
Application, application, application.
The OP has a turbocharged 2.5L 300+ hp 4 banger. Here's one of the RTS UOA's that I was referring to.
-Dennis
Originally Posted By: bluesubie
Are you sticking with the 3,750 mile OCI? If so, then I would definitely go with RTS. If you want to push it past 5k or so, maybe consider the Red Line.
OTOH, I've seen good uoa's on both with extended intervals. The RL uoa was about a year ago on a Stage II or III with a protune. The past couple of Subaru uoa's on RTS have shown less calcium than previous versions, but I don't recall if the magnesium amounts were different. I also seem to recall a couple shearing to a 30 grade.
-Dennis
Not sure I understand the logic here. RTS does *great* with extended drains, it is after all an HDEO. Its got a very high starting TBN, and holds TBN very well. It also holds viscosity well, I just had a recent UOA on a Jeep 4.0 at a tad under 5k miles, and it was still well within the 40-wt range.
Application, application, application.
-Dennis
