Should I run synthetic motor oil?
#1
Should I run synthetic motor oil?
Well i'm trying to decide whether I should run Mobil 1 in my 3.4 with 81,000 miles or just stick with conventional oil. I'm just worried about the possibility of Mobil 1 causing a leak. I know my truck has run Amsoil in the past because there is a sticker on the dipstick that says "Amsoil synthetic motor oil do not add or replace without owners permission", but not sure how long it was used for. When I just had my timing belt/waterpump replaced at the dealer they said my front crank seal was "seeping oil" and replaced it. I know most of you run synthetics, so am I going to have any problems with Mobil 1 getting past any seals/gaskets in my engine causing leaks?
#7
Originally Posted by ChickenLover
I switched to castrol syntec at 88k and it leaked like a siv when the engine was pushed hard. I switched back to conventional oil and everything is fine now.
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#11
It seems like most of you guys waited until you had a good amount of miles on your engines before you switched. I've heard that I should wait until 50K or so before running synthetic. Is that true? If not, when can I switch? Is it alright to switch at the first oil change (5K miles)?
#12
Originally Posted by UofATaco
It seems like most of you guys waited until you had a good amount of miles on your engines before you switched. I've heard that I should wait until 50K or so before running synthetic. Is that true? If not, when can I switch? Is it alright to switch at the first oil change (5K miles)?
I got mine at 153k soooo..........
#13
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I switched to Mobil 1 synthetic at 90k miles on my truck. I have no leaks. I had no leaks with dino oil either but if there was a slightly bad seal somewhere the synthetic would have exposed it.
#14
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Originally Posted by ChickenLover
... leaked like a siv...
sorry, it's the English teacher in me
#15
Chickenlover: Quick question. Are you the original owner and was the oil changed regularly before switching to synthetic? Just trying to figure out why some have leaking problems.
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