66K Is it too late to go full synthetic?

jwick

I went from dino oil to synthetic after about 75k in my SC300. Car never leaked until I made this change. Synthetics tend to clean up sludge in your engine. When this happened in my SC300 it created a leak at the main seal. From an engine standpoint I see no issues with it but I will never switch to synthetics in any car I own based on my experiences with it creating a leak.

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'10 G37T 6MT Graphite/Graphite - BP - G37T Build

mike444

This! Anyone think this could be a consistent problem in a Z with 66K?

jwick

I'll start by saying this is all speculation and I have no facts or backup for this statement but I would hope that this type of leaking is a thing of the past. My SC300 was a '96 and synthetics were not as common back then. I kind hope that there have been improvements in both the seals used to account for synthetics and in the actual synthetics themselves.

That being said I'll never switch to a synthetic later in a cars life just because it bit me in the past.

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'10 G37T 6MT Graphite/Graphite - BP - G37T Build