- Joined
- May 24, 2021
- Messages
- 1
OK - asking about opinions on oils is scary, LOL! Here's a related topic.
1997 Cruisers Yacht 3575 with twin Crusader 7.4L 454XL gasoline engines (fuel injected). Engine hours about 650 each. I run in Lake Michigan, so I'm only in the water from SPring to Fall - run about 50 hours per season.
The prior owner had no idea what kind of oil was put into these engines since the mechanics at his storage facility always did his oil changes. I was unable to reach the mechanics, at first. The cover on the engines said SAE 40. When asked it seemed like most people were leaning toward Rotella T4 15W-40, which I purchased.
Today, however, I spoke to the mechanics at the facility, and they told me they only use Quicksilver 25W-40. I don't mind spending a little more money for the Quicksilver brand, but here's the question. Is there a disadvantage to CHANGING oil types, or is there an advantage to NOT CHANGING oil types? My best assumption is that if it ain't broke, don't fix it - so stick with what has been working - Quicksilver.
Then again, I hear that Quicksilver has reduced pH and Zn in their formulas so maybe Rotella is a better choice?
Thoughts?
1997 Cruisers Yacht 3575 with twin Crusader 7.4L 454XL gasoline engines (fuel injected). Engine hours about 650 each. I run in Lake Michigan, so I'm only in the water from SPring to Fall - run about 50 hours per season.
The prior owner had no idea what kind of oil was put into these engines since the mechanics at his storage facility always did his oil changes. I was unable to reach the mechanics, at first. The cover on the engines said SAE 40. When asked it seemed like most people were leaning toward Rotella T4 15W-40, which I purchased.
Today, however, I spoke to the mechanics at the facility, and they told me they only use Quicksilver 25W-40. I don't mind spending a little more money for the Quicksilver brand, but here's the question. Is there a disadvantage to CHANGING oil types, or is there an advantage to NOT CHANGING oil types? My best assumption is that if it ain't broke, don't fix it - so stick with what has been working - Quicksilver.
Then again, I hear that Quicksilver has reduced pH and Zn in their formulas so maybe Rotella is a better choice?
Thoughts?