Did I damage my engine?

[Drivebelt]

Your engine will be fine. 5-6k miles (8 - 9,000km) is usually no problem for these modern conventionals. With a lot of highway miles (easier on oil/mile driven) in that oil change, one can run much farther than that without issue. You may have pushed the oil a little but modern conventional 5w30 (Group II+) motor oils are much better than those we were using 15 years ago. They use almost synthetic quality base oils.

The Castrol GTX you are using is a good oil, this UOA was 5,049 miles and the TBN was 4.1, which means the oil had lots of life left in it.

Changing oil at 5,000km (3k miles) is a waste with modern conventionals, they go much further than that easily. Run 8,000km (5k miles), and if it mostly highway you can go further.

 

[MatrixMulisha]

Just kidding...as above

 

[Liquid_Turbo]

Originally Posted By: Hirev
The 90% highway miles most likely helped. But not all engines designs, oils, and driving conditions are the same so it would be hard to say if there is long term consequences. A UOA with TBN would be interesting. Once the additives in the engine oil are shot things go down hill very fast. For example here is what 8700 miles with out an oil change on one engine design looked like. LINK HERE


this looks horrific. can anyone shed some light. is that due to dino being run for 8700mi? Or do you think there was previous neglect to the engine? would an extra 3700mi cause all that sludge?

 

[ThirdeYe]

Wow, he did a great job getting that engine looking good again.

It said in there that that was probably the first oil change, as it still had the factory oil filter on it.

 

[EddieB]

Originally Posted By: Hirev
The 90% highway miles most likely helped. But not all engines designs, oils, and driving conditions are the same so it would be hard to say if there is long term consequences. A UOA with TBN would be interesting. Once the additives in the engine oil are shot things go down hill very fast. For example here is what 8700 miles with out an oil change on one engine design looked like. LINK HERE


THIS IS [censored]!

 

[ericthepig]

I'm running M1 0w20 in my 2006 Mazda 6 - doing a 1 yr/10k mile OCI which ever comes first.