Motomaster 5W-40And, sadly, the A40 approved Mobil 1 0W-40 isn’t widely available around here. The many joys of living in Canada.
Motomaster 5W-40And, sadly, the A40 approved Mobil 1 0W-40 isn’t widely available around here. The many joys of living in Canada.
And, sadly, the A40 approved Mobil 1 0W-40 isn’t widely available around here. The many joys of living in Canada.
Keep in mind, not all SG-era oils had higher levels of AW additives, it depended on the oil, the levels of phosphorous just weren't capped like they later were under SM. That's why many of the Euro xW-30's didn't go past SL if they kept the API approval at all.The flat valve lifters, cams, chains and sprockets of the LT5 were designed with SG oil and its high ZDDP levels in mind. The gurus of the LT5 community always specify a high ZDDP oil for these cars.
ZDDP gets used up, so an oil with a few hard weeks of romping on it may likely have an equivalent % of available ZDDP as any of the new ILSAC GF6A lubricants. So replensishment may be in order depending on usage. This can come in the form of flat tappet cam break in lube supplement available from most speed shops or cam manufacturers. In your instance the phosphorous compound is helping with over TDC piston side-thrust at WOT / mid rpm. With the DOHC SUB valvetrain on this cammer chevy, moly and other modern FM would be likely more of benefit than ZDDP. And just as an additional mental note: modern oils are certified using a similar NISSAN DOHC SUB head.
My 1990 Corvette ZR-1 with the Lotus designed LT5 will be going in for some servicing the first of next week, and I won't be able to get my usual Amsoil Z-Rod 10W-30 by then. The LT5 wants its high ZDDP levels, so standard oils in the 800-900 range won't work.
Liqui Moly MoS2 Anti-Friction 10W-40 has been recommended as a viable option, but I'm not that familiar with it. Seems the ZDDP levels are good in it.
LOL because you're smart enough to plan ahead.Should be available at Parts Source, Canadian Tire and Walmart. I have a ton of it, typically buy it when it is on sale.
That’s always a good thing!LOL because you're smart enough to plan ahead.
Good post. Thanks.ZDDP gets used up, so an oil with a few hard weeks of romping on it may likely have an equivalent % of available ZDDP as any of the new ILSAC GF6A lubricants. So replensishment may be in order depending on usage. This can come in the form of flat tappet cam break in lube supplement available from most speed shops or cam manufacturers. In your instance the phosphorous compound is helping with over TDC piston side-thrust at WOT / mid rpm. With the DOHC SUB valvetrain on this cammer chevy, moly and other modern FM would be likely more of benefit than ZDDP. And just as an additional mental note: modern oils are certified using a similar NISSAN DOHC SUB head.
Don't go near any Liqui-Moly MoS2 suppliments it has NO PLACE in a modern engine with high efficiency full-flow filtration
The Suggestion of high certification and approval Mobil 1 0W40 or its Shell or Castrol or XX brand equivalent available off the shelf of many autocare outlets is a viable one in you situation.
- Ken
The LM oil you asked about has their MOS2 additive already mixed in. I would refrain from using that particular oil in your Corvette.Good post. Thanks.
To clarify a few things, I wasn’t looking at any oil supplements. The Liqui-Moly I asked about was the oil, not their supplement.
‘Also. The LT5 is not a modern engine. It’s an 80s Vintage design. My 2019 Ford Coyote is a very different beast. It’s a better engine in every way, more economical, smaller, 100 more hp, yet it lacks the character of the big LT5 beast.
Good information. Thanks!The LM oil you asked about has their MOS2 additive already mixed in. I would refrain from using that particular oil in your Corvette.
It might be better than adding the additive separate, but members here have provided pictures of the additive falling out of suspension and remaining in the oil pan (like sludge).
Good information. Thanks!
The A40s do interest me now. Gonna head out this afternoon to the local stores and see what can be had.Which oil are you leaning towards?
There are.Aren't there zinc additives on the market?
M1 15W50 had high zddp levels back in the day. Not sure what its add pack looks like now.
And, sadly, the A40 approved Mobil 1 0W-40 isn’t widely available around here. The many joys of living in Canada.
Still has plenty, 1300ppm-ishM1 15W50 had high zddp levels back in the day. Not sure what its add pack looks like now.
No thoughts on the Liqui Moli? Seems a good option from what I’ve been reading around here,
View attachment 105925
https://www.amazon.com/dp/B00CPL952G?ref_=cm_sw_r_ud_dp_SQFRZHN44JZYCGDNSZ6J